Trolling through Behance, I came across the work of Like Minded Studios.  They do some great work for companies like Hurley and Cadbury.  

IRON BABY from Patrick Boivin on Vimeo.

Visual FX artist Patrick Boivin has some great pieces in his body of 3D work.  In this short, he uses his baby daughter in place of Tony Stark. The result is pretty great.

Interesting 'making of' video documenting the creation of the HBO intro

The Third & The Seventh from Alex Roman on Vimeo.

The Third & The Seventh is a ballet of a short film that is amazingly computer generated by Alex Roman.  You can also see the making of it here.

3D Designer Eric Testroete created this amazing papercraft version of his head using 3D Studio Max.  You can see the whole process here.