So, I hear it's a great new codec that will really improve the quality of video chats in iChat. My only question is, how will the new version of iChat affect my ability to have video chats with PC users? Won't PC users need some sort of updated AIM that handles H.264? Or will the new version of iChat be able to use the old codec, too? Maybe I should wait until some people actually have Tiger and test it out, but I'd be interested to hear some initial thoughts on the matter.