Google Talk
Finally got around to trying Google Talk today. I like it. It is pretty no-frills. It is simply an instant messenger, with a audio component.
For years I had used yahoo as my primary IM. Lately their clients have become more and more bloated. Google talk is <1Meg to download and <2 meg installed.
I also like the fact that it saves the last part of your conversation. Today I tried it at home, took my laptop in and tried it at work, and my previous conversation was right there for me to reference.
Simple functionality.. I like it.