I don't have hotmail. I have gmail though and that also has a messaging client. I also have yahoo, but I'm rarely on that now days.

I checked meebo out. The whole working within the web browser is a little troublesome. Since I do a lot of surfing and probably wont check back. Not to mention AIM works fine, so I'd only be using it for msn.

If you're using meebo already though, if you used an aim account with it, it wouldn't be that troublesome right? Because you've already consolidated all your chat clients there I assume?