We have a stack of "AMD 1.9GHZ Opteron 2347 Quad Core OS2347WAL4BGE 1207Pin" and are actively looking for boards. The ASUS KFN4-D16 looks like a good deal, but we can not find much info on it.
The official CPU list has the Opteron 2347 Quad Core HE on it, but not the non-HE CPU.