Using both AutoCad and Revit 2011...
No problems (well, there is the occaisional crash but pretty seldom). I am using Vista Ultimatex64, but will probably be upgrading to Win7. I'm using a MBPro17 w/4GB RAM, and a 150 GB NTFS partition. Runs both much better than on Parallels; Parallels just seemed horribly slow, so I went the BootCamp route.