Just got a new MacBook Air at work yesterday. Transfer of files from old 12" G4 was going fine. Then we hooked it to my 23" HP monitor (which had worked fine on the 12" G4 and my previous Tibook) and tried out the wireless. Performance was incredibly slow, much slower than the G4. Thought it was the slow wireless at first, but the Activity Monitor showed that a kernel activity was using 1000% of the cpu (Yes, I realize that makes no sense)! By trial and error the tech found that disconnecting the external monitor returned things to normal speed. We assume that this is somehow due to having a non-Apple monitor. The HP is 7 years old and I don't mind replacing it, but it was working fine. Apple monitor conspiracy, anyone?