Your friends are using different type of Messaging services, it is difficult to download each Messenger in your computer. Meebo is a web service that allows you to chat with all of your contacts in one space. Meebo help the users to log into all of their networks at the same time.
Meebo supports IM accounts from both social networks. That means you can enter your Facebook and MySpace account IDs into Meebo and the chat with friends from both social networks in one IM box. Meebo also supports AIM, Gtalk, MSN Messenger, Yahoo Messenger, Jabber, and ICQ accounts.
The main feature of Meebo is you can use the service from any computer without install any software.
More details log to Meebo via IM Id.