Oh what's that? My Intuos3 is running perfectly smooth in Windows XP? Oh dear! Bwahaha! [/machate]

Joking aside, the only thing I could think of is to uninstall the tablet and Photoshop completely (including the registries) and install them fresh. Otherwise I couldn't really see a reason for it to run sluggish, though I have no experience with Rosetta or newer Mac's (last Mac I used was a late G4).

Hope you fix it! It'd suck to be without a tablet. Hey if all else fails maybe give Wacom a call?