as i stated before - it's not seen at all in NetBSD-current and windows64, 
while it's seen (and working) in FreeBSD-current

below is my FreeBSD dmesg (from custom kernel).

maybe it will help recognize ACPI (or maybe other) problems.

Copyright (c) 1992-2005 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
 	The Regents of the University of California. All rights reserved.
FreeBSD 6.0-CURRENT-SNAP005 #0: Sun Jul 24 16:52:47 CEST 2005
     root@new.dom:/usr/src/sys/amd64/compile/local
ACPI APIC Table: <Nvidia AWRDACPI>
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Athlon(tm) 64 Processor 2800+ (1808.81-MHz K8-class CPU)
   Origin = "AuthenticAMD"  Id = 0xfc0  Stepping = 0
   Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2>
   AMD Features=0xe0500800<SYSCALL,NX,MMX+,LM,3DNow+,3DNow>
real memory  = 268369920 (255 MB)
avail memory = 250380288 (238 MB)
ioapic0 <Version 1.1> irqs 0-23 on motherboard
acpi0: <Nvidia AWRDACPI> on motherboard
acpi0: Power Button (fixed)
pci_link0: <ACPI PCI Link LNK1> irq 3 on acpi0
pci_link1: <ACPI PCI Link LNK2> irq 10 on acpi0
pci_link2: <ACPI PCI Link LNK3> on acpi0
pci_link3: <ACPI PCI Link LNK4> on acpi0
pci_link4: <ACPI PCI Link LNK5> on acpi0
pci_link5: <ACPI PCI Link LUBA> irq 10 on acpi0
pci_link6: <ACPI PCI Link LUBB> irq 10 on acpi0
pci_link7: <ACPI PCI Link LMAC> irq 5 on acpi0
pci_link8: <ACPI PCI Link LAPU> on acpi0
pci_link9: <ACPI PCI Link LACI> irq 11 on acpi0
pci_link10: <ACPI PCI Link LMCI> on acpi0
pci_link11: <ACPI PCI Link LSMB> irq 5 on acpi0
pci_link12: <ACPI PCI Link LUB2> irq 10 on acpi0
pci_link13: <ACPI PCI Link LFIR> on acpi0
pci_link14: <ACPI PCI Link L3CM> on acpi0
pci_link15: <ACPI PCI Link LIDE> on acpi0
pci_link16: <ACPI PCI Link LSID> on acpi0
pci_link17: <ACPI PCI Link LFID> irq 11 on acpi0
pci_link18: <ACPI PCI Link APC1> irq 16 on acpi0
pci_link19: <ACPI PCI Link APC2> irq 17 on acpi0
pci_link20: <ACPI PCI Link APC3> irq 18 on acpi0
pci_link21: <ACPI PCI Link APC4> irq 19 on acpi0
pci_link22: <ACPI PCI Link APC5> irq 16 on acpi0
pci_link23: <ACPI PCI Link APCF> irq 0 on acpi0
pci_link24: <ACPI PCI Link APCG> irq 0 on acpi0
pci_link25: <ACPI PCI Link APCH> irq 0 on acpi0
pci_link26: <ACPI PCI Link APCI> irq 0 on acpi0
pci_link27: <ACPI PCI Link APCJ> irq 0 on acpi0
pci_link28: <ACPI PCI Link APCK> irq 0 on acpi0
pci_link29: <ACPI PCI Link APCS> irq 0 on acpi0
pci_link30: <ACPI PCI Link APCL> irq 0 on acpi0
pci_link31: <ACPI PCI Link APCM> irq 0 on acpi0
pci_link32: <ACPI PCI Link AP3C> irq 0 on acpi0
pci_link33: <ACPI PCI Link APCZ> irq 0 on acpi0
pci_link34: <ACPI PCI Link APSI> irq 0 on acpi0
pci_link35: <ACPI PCI Link APSJ> irq 0 on acpi0
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x4008-0x400b on acpi0
cpu0: <ACPI CPU> on acpi0
acpi_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff,0xcf0-0xcf3 on acpi0
pci_link29: BIOS IRQ 5 for -2145927624.1.INTA is invalid
pci_link23: BIOS IRQ 10 for -2145927624.2.INTA is invalid
pci_link24: BIOS IRQ 10 for -2145927624.2.INTB is invalid
pci_link30: BIOS IRQ 10 for -2145927624.2.INTC is invalid
pci_link25: BIOS IRQ 5 for -2145927624.5.INTA is invalid
pci_link27: BIOS IRQ 11 for -2145927624.6.INTA is invalid
pci_link35: BIOS IRQ 11 for -2145927624.10.INTA is invalid
pci0: <ACPI PCI bus> on pcib0
pci_link29: Unable to choose an IRQ
pci_link23: Unable to choose an IRQ
pci_link24: Unable to choose an IRQ
pci_link30: Unable to choose an IRQ
pci_link25: Unable to choose an IRQ
pci_link27: Unable to choose an IRQ
pci_link35: Unable to choose an IRQ
agp0: <NVIDIA nForce3-250 AGP Controller> mem 0xe0000000-0xe7ffffff at device 0.0 on pci0
isab0: <PCI-ISA bridge> at device 1.0 on pci0
isa0: <ISA bus> on isab0
pci0: <serial bus, SMBus> at device 1.1 (no driver attached)
ohci0: <OHCI (generic) USB controller> mem 0xeb005000-0xeb005fff irq 21 at device 2.0 on pci0
ohci0: [GIANT-LOCKED]
usb0: OHCI version 1.0, legacy support
usb0: SMM does not respond, resetting
usb0: <OHCI (generic) USB controller> on ohci0
usb0: USB revision 1.0
uhub0: nVidia OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 4 ports with 4 removable, self powered
ohci1: <OHCI (generic) USB controller> mem 0xeb000000-0xeb000fff irq 22 at device 2.1 on pci0
ohci1: [GIANT-LOCKED]
usb1: OHCI version 1.0, legacy support
usb1: SMM does not respond, resetting
usb1: <OHCI (generic) USB controller> on ohci1
usb1: USB revision 1.0
uhub1: nVidia OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 4 ports with 4 removable, self powered
ehci0: <EHCI (generic) USB 2.0 controller> mem 0xeb001000-0xeb0010ff irq 23 at device 2.2 on pci0
ehci0: [GIANT-LOCKED]
usb2: EHCI version 1.0
usb2: companion controllers, 4 ports each: usb0 usb1
usb2: <EHCI (generic) USB 2.0 controller> on ehci0
usb2: USB revision 2.0
uhub2: nVidia EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub2: 8 ports with 8 removable, self powered
nve0: <NVIDIA nForce MCP7 Networking Adapter> port 0xb800-0xb807 mem 0xeb002000-0xeb002fff irq 21 at device 5.0 on pci0
nve0: Ethernet address 00:11:09:d2:83:6b
miibus0: <MII bus> on nve0
ukphy0: <Generic IEEE 802.3u media interface> on miibus0
ukphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
nve0: Ethernet address: 00:11:09:d2:83:6b
nve0: [GIANT-LOCKED]
pcm0: <nVidia nForce3 250> port 0xbc00-0xbcff,0xc000-0xc07f mem 0xeb003000-0xeb003fff irq 22 at device 6.0 on pci0
pcm0: [GIANT-LOCKED]
pcm0: <Avance Logic ALC850 AC97 Codec>
atapci0: <nVidia nForce3 Pro UDMA133 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xf000-0xf00f at device 8.0 on pci0
ata0: <ATA channel 0> on atapci0
ata1: <ATA channel 1> on atapci0
atapci1: <nVidia nForce3 Pro SATA150 controller> port 0x9f0-0x9f7,0xbf0-0xbf3,0x970-0x977,0xb70-0xb73,0xdc00-0xdc0f,0xe000-0xe07f irq 23 at device 10.0 on pci0
ata2: <ATA channel 0> on atapci1
ata3: <ATA channel 1> on atapci1
pcib1: <ACPI PCI-PCI bridge> at device 11.0 on pci0
pci1: <ACPI PCI bus> on pcib1
pcib2: <ACPI PCI-PCI bridge> at device 14.0 on pci0
pci_link18: BIOS IRQ 22 for 0.6.INTA is invalid
pci_link19: BIOS IRQ 23 for 0.10.INTA is invalid
pci2: <ACPI PCI bus> on pcib2
pci2: <display, VGA> at device 6.0 (no driver attached)
fxp0: <Intel 82551 Pro/100 Ethernet> port 0xa400-0xa43f mem 0xea020000-0xea020fff,0xea000000-0xea01ffff irq 17 at device 10.0 on pci2
miibus1: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> on miibus1
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fxp0: Ethernet address: 00:07:e9:0a:04:1a
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
sio0: type 16550A
ppc0: <Standard parallel printer port> port 0x378-0x37f,0x778-0x77b irq 7 on acpi0
ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model IntelliMouse, device ID 3
orm0: <ISA Option ROMs> at iomem 0xc0000-0xc7fff,0xc8000-0xcbfff,0xcc000-0xcd7ff,0xce000-0xcf7ff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounter "TSC" frequency 1808811452 Hz quality 800
Timecounters tick every 1.000 msec
IPv6 packet filtering initialized, default to accept, logging limited to 50 packets/entry
ipfw2 (+ipv6) initialized, divert loadable, rule-based forwarding enabled, default to accept, logging unlimited
ad0: 38165MB <Seagate ST340016A 3.19> at ata0-master UDMA100
acd0: DVDR <LITE-ON DVDRW LDW-851S/GS0K> at ata1-master UDMA33
Trying to mount root from ufs:/dev/ad0s1a
cd0 at ata1 bus 0 target 0 lun 0
cd0: <LITE-ON DVDRW LDW-851S GS0K> Removable CD-ROM SCSI-0 device 
cd0: 33.000MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present