So I've had my iMac about a week now. I started a thread about not having any freezes. Well... this weekend I experienced two. Both of which occurred while using iTunes (once while importing my old library into iTunes from an external USB drive, and once just having iTunes open). Not much rhyme or reason to the freezes... nothing in the crash logs. This is slightly depressing, since the replacements people are getting seem to freeze as well. I still don't think this is Wi-Fi related... I just think there's a serious conflict between the ATI 4850 chip and the rest of the hardware... This is pretty much unacceptable for a new machine.