Bringing the nForce4 chipset to the SFF market isn’t a small feat, but Shuttle has managed just that with the new SN25P model of their XPC line. 
I have to admit that I’ve become very fond of the SN25P after playing around with it for couple weeks. It really is an amazing little system packed full of features you would never expect, not to mention far more stable than older versions of the XPC. It appears that Shuttle has finally overcome the heat issues that have plagued SFF systems.