If you're looking for a fully configured small form factor system, [H]ard|OCP's subsidiary, [H]Consumer may have just posted something of interest. They've evaluated Polywell's Mini-Box2 939NP, and they seemed to like it quite a bit. The system earned an 8.4 on the Hard-O-Meter.
"The Mini-Box2 is a solid, no-frills computer from what appears to be a solid, no-frills manufacturer. Polywell offers a versatile and varied online configurator with two levels of options - catering to both enthusiasts and mainstream users alike. That is something we have yet to see elsewhere."