I have Autodesk Inventor LT Technology Preview 2009 and it runs nicely on this HP TC1100, 1GHz Pentium M, 1.24 GB RAM, with 2 GB RAM coming soon. I don't use a virtual disk and that helps.
You get it by following some registration procedures. Having a business name, goal, and plan helps. They don't just give it away but it can be had for free. I even got them to send the CD media so this installation can survive a hard drive crash; it wasn't just downloaded.
If there is interest here, I will retrace my steps and post relevant links.
I am subscribed to this thread; replied will come to me by email and I will attend to them by returning here to post.
Doug Goncz
Replikon Research
Seven Corners, VA 22044-0394