I just imported another Windows XP image, this one originally created on a real PC, then migrated to Parallels Desktop 3.0 before importing into Fusion 2.0b2.
I noticed that the Parallels Share Toolbar was still displaying, and sure enough, Add/Remove Programs lists Parallels Tools. I can't run that uninstaller, though, because it apparently requires that you run it under Parallels!
This isn't a big deal to me; I'm only keeping this image around until I copy everything into a fresh, Fusion-created Install. But if it's a known and unsolvable problem, you might want to recommend that people uninstall Parallels Tools before importing. In fact, between this and the hive-expansion problem, it seems to point to the need for a "preimporter" to run under Parallels...