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eBuddy, the popular IM client aggregator, just let us know that they now have an iPhone version in alpha, making it easy to chat on MSN (Windows Live?) Messenger, Yahoo Messenger and AIM on your iPhone.
The version includes a series of interface changes, customizable fonts, contact list scrolling and more. The really neat part: there's no special URL: just visit eBuddy.com on your iPhone and it will auto-detect the device and send you to the right place.
Ebuddy's rivals include Meebo and eMessenger.