I've run into a recurring problem with the MacBook that I haven't totally figured out yet: About half the time I try to print, the application I'm trying to print from crashes before the Print dialog ever appears.
I have a PowerMac G4/933 that the printer is connected to (an HP DeskJet 5500). The G4 has printer sharing turned on. The MacBook is connecting to the G4 via Airport.
About half the time I try to print, when I select "Print" from the file menu (or press Command-P), the application will hang for a few seconds and then crash (prompting the "Application has unexpected quit" message to show up). At other times, it works fine and I can print just fine.
I haven't yet tried to connect the printer directly to the printer via USB and see if the crash continues to happen, but may have to try that here soon. It hasn't gotten to the point where I'm ready to throw something. This is just mildly annoying at best at the moment.