Meebo gives you the option to sign in with your mail accounts of Aim, Yahoo, Google Talk and MSN without any need to install the messenger. The process is so easy is that anyone can follow it. To sign in, you just need to open the Meebo website and give the login name and password of your respective account. Once signed in, you can start chatting with your friends. You can also Sign in on the Meebo website and create your own Meebo ID.
So what you are waiting for, go to www.meebo.com and start chatting.