DFI LANPARTY UT nF4 Ultra-D <http://www.dfi.com.tw/Product/xx_product_spec_details_r_us.jsp?PRODUCT_ID=3471&CATEGORY_TYPE=LP&SITE=US>
The kernel recognizes a USB-based keyboard and mouse but GRUB does not, so one must explicitly enable USB keyboard and mouse in the BIOS to interact with GRUB (eg. to select "that other OS").
I've not yet tested audio on this system.
The gigabit LAN works, but I need to check to see which one I've got plugged in. (It's got two channels and they use different chipsets.)
The rest of the system:
Gigabyte nVidia 6800 GT Seagate SATA 250 GB HD NEC DVD writer no floppy 1 GB OCZ RAM in slot 2 (I'll add another stick to get dual channel later) CPU is AMD64 Venice 3000+
I've got WinXP Pro 64-bit on the first partition, 1 GB of swap at the "end" of the drive, and the middle physical partition is FC4. GRUB worked fine except for the USB keyboard issue noted above. The boot menu timeout is a bit short, though.