After submitting their app almost two years ago in March of 2008 (Bush was still Prez!), Meebo has finally made it through the App Store approval process.
IT looks like the wait might have been worth it. The simple app allows you to connect to almost all of the different services you use such as AIM, Facebook Chat, and MSN messenger (no Skype like Fring). The app also comes with a great design, searchable chat history, and wait for it push notifications. The app is free on the App Store.