Trillian.
Also Game Voice occasionally to talk, actually talk! to friends from back east. G/V will not work with newer versions of MSN messenger since it's a discontinued product so I keep the old MSN installed for when I'm using G/V, and use Trillian for most of the time. I like having all of my communication programs all in one. Now, if I can only remember my old AIM name. I actually know the password, just can't remember the username.
