I'm picking up a nice machine for other testing purposes. It'll be 
midrange:

Tyan Thunder K8W (S2885)
LSI MegaRAID SATA 300-8X 8PT
8 x 250GB Maxtor SATA2/16MB/etc (for the MegaRAID)
1 x 250GB SATA2 for multibooted OSes
8 GB DDR400, ECC Registered RAM
2 x AMD Opteron 246


... and basically, I'm wondering whether there's anyone else running 
NetBSD on similar hardware with a useful degree of success?

One specific: am I going to need to build a specialised kernel to prep 
for the 8GB RAM? I seem to recall that sometimes memory above 2GB 
requires:

REALBASEMEM
REALEXTMEM

... does it still?

Comments appreciated; note the Reply-To: current-users@netbsd.org.

Thanks.