I tried to work in perspective mode, and it is nearly impossible. Even a slight movement of the SpacePlot controller will send the geometry way off-screen. Switch to Ortho, and it is very sluggish, but useable.
No RMB commands is also somewhat disconcerting, but overall it's looking good.
Windows 7 Ultimate RC1
Inventor 2010 SP1
Raid 0 - 2 WD VelociRaptor HDs1.5 TB WD Caviar Black Raid Storage
3.00G Phenom II X4 945 Quad Core Processor
Nvidia 8800 GT 512mb Driver 185.85
8 Gig DDR 2 1066 mhz Ram
Dual 23" Acer Monitors
Space Plot Motion Controller