Facebook Chat > IM ?

So Facebook Chat went live today (after a couple of weeks of private beta testing) allowing users to see which of their friends are online and chat in real time the same way one would on MSN Messenger, Skype or GoogleTalk.

ReadWriteWeb has a good summary of the features from the original Facebook blog announcement at the start of the month...

UPDATE - Ok, been playing for 10 minutes and the UI is REALLY good for a V1 release. Initial thoughts are it needs a floating notification widget / desktop client for when your browser is minimised but that's about it. This is going to have a considerable impact on the IM market and it will be interesting to see the competitor and press reaction over the coming weeks.