IMO is a web based instant messaging service where you can instant message your friends on AIM, Google Talk, MSN, and Yahoo Messenger.

Well, maybe that is a little dramatic, but it will certainly make instant messaging cooler and easier to use. First, if you sign into more than one account you can link your accounts. When you link your accounts, logging into any one of your linked accounts will automatically sign you into the other accounts.

If you invite a buddy who is not on IMO they will be sent a URL which leads them to an IMO page where they can participate in the group chat. Your friend is also free to then sign into IMO if he/she wants to invite more people to the chat.

Imo.Im was launched in April and its creators are former employees of Google. It has about 70,000+ users.