I present to you: Legit Chat!
A chat program that's nowhere near as great as Chatters, probably won't be used much, and has an incredibly racial skin.
That aside, I'm hoping to develop this into something a little different from what most chat clients are about, instead making it a far more private system so that friends can talk easier than needing to use the pager (Or Windows Live, yada yada).
It's literally programmed to use as little CPU as possible, while still giving me the same functionality, and a bit more, that's needed. I'm probably going to make a minimize mode, which will re-skin most of it for the client, into a VERY small (I'm thinking 64x64 window size) alert box that will flash whenever a message is posted in the same channel as you are in, along with a button for re-sizing it. Something you can stick in the corner of your screen and ignore until someone says something.
Of course I'll probably give it some sound effects too, but personally I find things like that annoying and I'll end up turning them off in the options.