From Fabbaloo:

Autodesk is previewing its Inventor Fusion software, which “unites direct and parametric workflows within a single digital model created in Autodesk Inventor.”

Here are the updates touted in the press release:

Surfacing support! Users can now work seamlessly between solids and surfaces, expanding their confidence and capabilities to tackle design changes. By enhancing the existing translators to read surface data and adding new Parasolid, Rhino, IGES and AliasDesign .wire file import capabilities user have access to an even larger number of design formats.
Simplification wizard. Simulation users now have one button simplification of designs. This makes simplifying common geometry fast and easy and ensures that mesh and solves times are as fast as possible.
Ease of use improvements. New marking menus, sketch ease of use and modeling ease of use, make this release of Inventor Fusion the easiest to use yet. Did we mention it was easy?

Well that sounds fun. I downloaded Inventor Fusion for myself, and there’s just a brief questionnaire to fill out beforehand. If you’re looking for a great 3D modeling option, give it a try. But act now, since the previews will expire.

– The Microsoft Windows compatible technology preview executable expires on April 1, 2013.
– The Apple OS X compatible version of the technology preview expires on January 1, 2013.

Hey Mac users, see that? You can use this Autodesk program!