If it weren't for XP these netbooks might have SSDs and 2GB RAM. If you could REALLY get a linux netbook it would have these things and perform even better. Plus Ubuntu netbook 10.10 sucks, I wish they would have used 10.04, which is to me much better. Perhaps Jolicloud would be a better comparison as well.
For those who havn't used Autodesk's software, they are the microsoft of the CAD world. Their software is only popular because it of its wide spread use and the difficulty of converting software. AutoCAD makes IE look cutting edge and great to work with, and is probably one of the most bloated format's I've seen. Inventor, now on release 10, is still an incomplete product compared to other 3D software and Mechanic Desktop makes me want to draw on an etch-a-sketch.