Smart of you to mention that Bulldozer CPUs are technically pin-compatible with AM3, and are supported by some AM3 boards; however, ITX boards would technically only be capable of handling the FX-4100 and FX-6100. A 125W TDP is out of the reach of ITX boards, which would already struggle with VRM longevity under the 95W of triple module CPUs. The Asus M4A88T-I, for example, does not support first-generation FX.
Surely sad for consumers, but a smart move from an electrical and customer support perspective, since cramming a northbridge, southbridge, a decent 125W+ capable VRM, as well as their heatsinks into 17 x 17cm board is generally not a good idea.
EXACTLY the point I was trying to make...