Prof Jonathan Corney has a blog on the Spatial website at:
http://forums.spatial.com/spatial/blog?blog.id=Corney
I've known Jonathan for some time. He's been an active CAD researcher for 25 years. He has some interesting thoughts on CAD from a perspective that's a bit broader than just what's currently commercially available in CAD software.
I thought his blog might be of some interest to members of this forum.
Andy