I could care less about AIM, Yahoo IM, ICQ, and MSN.
I need one that can communicate with AIM, Yahoo, and MSN users.
Trillian sucks donkey balls - they no longer support Yahoo/Yahoo blocked Trillian/whatever. I have it, but I'm not going to install it. I'm thinking about deleting it. (It's in a Shared folder, that's what's stopping me.)
So... post your Instant Messenger program and where I can get it, and what makes it so cool.