I searched the forums but didn't see anyone that had mentioned this so I thought I'd point it out. I apologize in advance if someone has already mentioned this
http://labs.autodesk.com/technologies/inventor_lt/Big download unfortunately 900+ mb, and only available in US/Canada I guess.
However, not a bad way to get a "freeish" copy of Inventor at least for awhile.. according to the site it says "Once activated, Inventor LT Technology Preview will run until May 1, 2008."
I'm playing around with it to see how feasible it is to create some various millwork designs with it (not exactly it's intended purpose I suppose).