It looks like Meebo isn’t going to be the only one in the Online instant messenger arena. Kool IM is amazing similar to Meebo when it comes to features, but I like the interface on Kool IM much more. They condense down all of the logins to a single line and do not combine any messenger types, such as Google Talk and Jabber. This gives the homepage a more slick and streamlined look.
Both sites support connecting to AIM, MSN, Yahoo, ICQ, Jabber, and Google Talk. One thing that Meebo does better is that it utilizes the current browser window to display your chat sessions instead of popping open a new window. If you connect to multiple networks each time you login then Meebo is probably the nicer route to go. Meebo seems to be a little more advanced technologically but Kool IM is off to a good start.