The other day I updated the Inventor Fusion technology preview on the Labs site.
Download Inventor Fusion via Autodesk Labs
Inventor Fusion allows you to use intuitive direct manipulation capabilities along with parametric workflows. With this 2012 update, the technology preview executable expires on May 1, 2012. At this point, the technology preview on Labs and the Inventor Fusion that ships with Autodesk 2012 products are functionally the same.