I plan on getting a Powerbook G4 any day now (Damn stock problems...) and already have a USB -> Serial converter. VirtualPC is on my list of things to buy, so I'll try the official upgrade files and your logo editor out on it to see if it works.

(Whoever the Apple guy was at the meet managed to bring me completly over after seeing Mac OS X running on a Powerbook G4. I'll still keep the PC desktop for gaming, but it looks like an Apple laptop for my mobile work for a while)