Facebook launches its IM service

Facebook is testing its IM-service and is going to present it to the public in the near future, possibly next week.

According to rumors, it will be built on the basis of Jabber, which may allow the use of third-party clients.

Based on> mashable.com .
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PS Will this be an example for domestic social networks? (vkontakte.ru, odnoklassniki.ru, etc ...)