Autodesk is now shipping Autodesk Inventor Professional 9. Built on the Inventor Series platform, the Professional product also includes Cable & Harness, Tube & Pipe, Stress Analysis (parts only) and IDF Import functionality. The Stress Analysis module is based upon Ansys - the leader in FEA. Note that while the FEA functionality is for parts only, assemblies can be derived into a single part file. Granted, there are some limitations to this (for example, since the assembly is now as single part file, you cannot specify seperate materials for each component) it may prove to be an acceptable workflow depending on your assembly and FEA requirements.