Microsoft has announced that the work has been completed to combine its MSN Messenger instant messaging network with Yahoo! Messenger. From today the services have combined 350 million users who could communicate to those on the other network as well. The combined network is now the worlds biggest.

Since Google bought a stake at AOL earlier this year, the two companies have also spoken of combining Google Talk and AIM as well although not timetable for integration has yet been announced.

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