From:  Nick (NVANLAAR)
4149.6 In reply to 4149.2 
Autodesk Inventor Fusion does this as well. Check out the technology Preview (free for now) or if you have or are going to get AutoCAD 2012 or one of it's variants, it comes included.

This is an interesting preview, but it will only go to the logical limit when you click "OK":

It's definitely fun to play with if a little slow.

Windows 7 x64, Precision T3400, Intel C2Q @ 3 GHz
8 GB RAM, ATi Radeon HD 3870