Yer right, Neo, that baby's rack mount. She arrived last night, and I confirmed it. She also takes registered 184 pin DDR. Don't you just love small complications.
If ya'll are interested, essencom.com has 'em in stock for about $575 plus shipping. Nice board, though. On-board U160 SCSI, dual NIC, ATA100, ATA66, 4 registered DIMM slots, on-board 4 meg video, etc. Hell of a server board, but bloody expensive.