Do you play online PC games? There is a IM program made for gamers in mind. It is called Xfire, and you can get it at http://www.xfire.com
Xfire is very similar to other chat programs like MSN or AIM, except for gamers. How it works is this: Download the client, install, make a user name. Start inviting your friends and they show up on your Xfire client.
When you play inside a game, people can send you Xfire messages within the game. How this works is this: You see a Xfire pop up message within the game for a few seconds, and then it disappears.
If you want to chat again while in game, press the button combination Scroll Lock + X, and you can chat right there on the spot. The beauty of this is, you don’t need to exit your game, or Alt- Tab or anything. Pretty sick eh? Also, Xfire lets you upload your screenshots and hook it into your account, as well as log how many hours you been playing that favorite game of yours.
If you want to add me, my tag is rockdawg.