There is a new Autodesk Labs (http://labs.autodesk.com/) addition for Autodesk® Inventor 11 users.
Here is the official description:
"Use this application to convert neutral 3D CAD (STEP, SAT or IGES Solids) models into fully featured Autodesk® Inventor™ 11 models. Feature mapping can be executed automatically or interactively as needed to maintain design intent."
There are other Autodesk Labs addition coming in the future so subscribe to the RSS feed on the labs page or check back often and spread the word.