Earlier this month, Facebook started rolling out a chat feature, and as of now, the thing seems to be fully open. All of the social network's users can either talk to or ignore their friends at will.

A small sort of box at the bottom right corner of the screen shows whether you're "offline" or "online." Go online, and it'll add information about which friends are available. Otherwise, options are extremely limited, but as far as holding basic conversations goes, Facebook Chat works fine.

Furthermore, Facebook Chat appears to be popular. Wall mentions of "facebook chat" are occurring at about six times the highest level "beacon" ever reached, according to Facebook Lexicon.

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