Recently, my 2.33 C2D iMac 20" has been waking up randomly at night from sleep mode. It's done this 3 times now... once during the weekend (I dont remember what time), once last night at 10:30, and once the night before at 12:15am. What might be causing this? I'm pretty sure my iPods were plugged in one time when this happened, but perhaps that is not the problem. Let me know if you guys have a solution or a hint or something. I'll also report back if it happens again tonight.