With a -current/i386 kernel of 14 June source, I get

xi0: device timeout

errors. The odd thing (which rings a bell, but I can't remember the context)
is that 2 phys attach to the xi:

pcmcia0: CIS version PC Card Standard 5.0
pcmcia0: CIS info: Xircom, CreditCard 10/100, CE3-10/100, 1.00
pcmcia0: Manufacturer code 0x105, product 0x10a
pcmcia0: function 0: network adapter, ccr addr 800 mask 3
pcmcia0: function 0, config table entry 1: I/O card; irq mask 8ebc; iomask 4, iospace 0-f; memspace 0-fff; mwait_required rdybsy_active io8 io16 irqpulse irqlevel powerdown
xirc0 at pcmcia0 function 0: <Xircom, CreditCard 10/100, CE3-10/100, 1.00>
xirc0: id=0143
xi0 at xirc0
xi0: MAC address 00:10:a4:ab:47:0c
ukphy0 at xi0 phy 0: Generic IEEE 802.3u media interface
ukphy0: OUI 0x00a0be, model 0x0000, rev. 0
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
ukphy1 at xi0 phy 16: Generic IEEE 802.3u media interface
ukphy1: OUI 0x00a0be, model 0x0000, rev. 0
ukphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto

(The card is a xircom RE-100 so no modem)

Cheers,

Patrick