Setup assistant/Migration assistant not working
I'd like to import an account from my elderly PowerBook G4 (running 10.5.8, all updates applied) to my brand-new MacBook Air (mid-2011 model). In theory, Lion will accept anything from 10.5.3 or later, but in practice, it isn't working. More than half an hour on the phone with Apple Support produced no explanation or solution.
The setup assistant on the MBA says that the G4's version of Migration Assistant (1.2.3 (177)) needs to be updated. Apple Support says that 1.2.3 is the updated version, and therefore that it ought to work. Both computers are on the same wireless network (yes, it would be nice to do this over Firewire, but MBA's don't have a Firewire port). Both the MBA's setup assistant and the G4's migration assistant say "Looking for other computers..."
Apple Support eventually shrugged and suggested that I spend the next day or two creating a Time Machine backup (I'm not kidding about the time estimate: that's what it took the first time I ran one, and I turned it off months ago because when it kicks in, that poor little machine comes to a standstill) and then hoping that the MBA is somehow able to see the Time Machine backup.
Does anyone have any suggestions that (1) involve a proper migration, not a manual copying of files and re-creation of settings and (2) have a chance of being faster than a Time Machine backup? Has anyone else encountered this problem?
MacBook Air, Mac OS X (10.7)