I'll be on both, and Yahoo if anyone wants, at 5 I will set it up and start inviting people in and give out the AIM Chatroom name.
Edit: Please remember though that for me 5 PM is just a guess, my partner and I are trying to finish up our Wii game so that we can display it at Open House Friday. So how fast I can get it converted to Mac and playing will determine when I can start the chat.