Well, the new iBook has arrived, and I must say it is pretty sweet. Popped they keyboard to add 256MB more RAM and discovered that one of the screws holding the RAM shield in place was screwed down so tight that I couldn't get it to move at all. Took it in to the Apple Store at Woodfield to have a Genius look at it and they weren't able to make any progress, so I gave Apple support a call and they're sending a box on Monday. I'll be glad to let them strip the threads rather than doing it myself.
Luckily, I hadn't moved anything over from the iMac to the iBook, so there's really nothing to back up before I send it off.