PlayCanvas [disclaimer: I'm CTO] has a full 3D import pipeline from FBX, COLLADA and OBJ which supports skinned animation and all default materials.

Plus we have a level designer, physics engine, scripting API, hosted publishing, and a halfway decent positional sound library :-)

You can see importing models and animations in action here http://www.youtube.com/watch?v=qy_fRcV-3wk, or signup for yourself [http://playcanvas.com]