Just looking around and came across the Iwill Zmax-d2
Now fitted with a pair of Opteron 270’s, 2 x 2Gb sticks of RAM, drop in my pair of 7800GTX’s and you effectively have a fairly powerful all-round machine in a SFF.
Unfortunately the Zmax-d2 seems to be like rocking-horse manure in its scarcity 
Seems to be available from Iwill in the 'States but they do not ship to Blighty and the only UK e-tailer who I can see lists it is Scan and they have no stock.
Very nice Alta, I’m sure Mackerel was looking at an Iwill dual opteron system at one time, maybe he will be along later to let us know or point in the direction of other suppliers.
Curly
Was several mojo’s ago I think. We started discussing how dual single core was redundant as dual core was out then. The possiblity arose of sticking a couple dual-core opterons in the Iwill box. Think it turned out that the 1st ones didn’t support dual core, but the later model did. Trouble was the cost at the time so I didn’t consider it further. Decided dual core would be more than “enough” for me especially at AMD prices.
The ‘original’ zmax-dp does support dual-core with the latest BIOS.
No stock at the moment , but it has crossed my mind more than once in the past few weeks , maybe there will be some more soon at SCAN
Edit :- should read the post fully in future