I know this is going to sound crazy, but I think iChat only works during certains times. Like right now for instance, when I try to click on it, it bounces up and down a few times and them just stops without opening. No error message or anything. This has happened before but the problem just seems to disappear the next day. Repairing permissions does nothing. What makes this even more strange is that this happens on more than just one of my Macs. iChat will stop and start working again at the same time on different Macs that are connected in no way. Has this happened to anyone else? Does your iChat work right now?