Yet another library that is 90% of an online 3D CAD app that I've envisioned and blogged about: http://hacking-shindyapin.tumblr.com/tagged/3dCAD; and open-source, to boot! I think we'll see a usable 3D CAD sometime within the first half of 2011.
Thingiview actually grew out of another project I'm working on to do just that called CloudSCAD: http://blog.cloudscad.com
Yup, following you on the OpenMFG mailing list... that's how I came across that link :-)
Really nice. Great way for me to share designs with remote designers and stakeholders with having them install a viewer. Could be the start of a Scribd for the physical world.