i just purchased a new iMac 3.06 today. i was planning on putting the stock RAM (2GB) that comes in the iMac into my MacBook, and putting third-party RAM (4GB) into the iMac. However now that the frequency of the RAM is 800Mhz instead of 667MHz i don't know if i can. Does anyone know if i can put 800MHz RAM into my MacBook that supports 667Mhz? i'm not expecting it to run at 800Mhz in the MacBook even though that is the RAMs frequency, but will it run at 667MHz or is that a compatibility issue that won't work? thanks!