eBuddy Lite Messenger - new mobile version

eBuddy launched a complete new mobile version, built from the ground up to offer you the best chat experience on any mobile device, without having to install anything.
eBuddy Lite Messenger version allows you to login all your accounts at once.
Chat with your friends from all your MSN, Yahoo, AIM, and Google Talk accounts in one single buddy list!

eBuddy is an alternative to meebo, koolIM, imhaha, mabber.

imo.im - instant messaging and video chat

imo.im is a web based instant messaging service where you can instant message your friends on AIM, Google Talk, MSN and Yahoo Messenger (similar to meebo, ebuddy, imhaha, koolIM, mabber)
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.
IMO group chat works across the different networks which means that in a single group chat you can have buddies from AIM, Google Talk, MSN and Yahoo Messenger, all talking to each other.