It's a few months that Yahoo! and MSN (or Live) users can use a single Messenger to communicate with their friends. If you have a Yahoo! ID and use Yahoo! Messenger then you can add your friends which have an MSN Messenger or Live ID and vice versa. But many users still use Messengers other than Yahoo! and Live. For example Google Talk have recently found many spectators because of its simple and fast desktop client and ease of use, or many old Internet users still prefer their AOL account.

In addition, if you have multiple IDs in various networks and you have to use all of them at same time you need to have at least 3 messengers (GTalk, Yahoo or Live and AIM). It is equal to waste of memory and resources of your PC. So what the solution is?

Recently I found meebo.com, a web based Instant Messaging service for Yahoo!, MSN, AIM and Google Talk. You can enter your login information and start instant messaging immediately in one browser page. meebo uses AJAX to communicate with server and has a user friendly environment.

You can also chat with other meebo users in its rooms, use meebome.com on your personal website to chat with your visitors and more.

UPDATE: Forgot to mention that meebo supports many languages including Persian and also support ICQ and Jabber.