That Was Fast: Facebook’s Web/Mobile Chat Feature Is Now Getting Rolled Out Globally

Now Facebook will alert you when your friends are on web devices or mobile devices. This should help Facebook deliver information correctly to user who are on mobile devices. We all know how screwed up web to mobile messages can be.

http://techcrunch.com/2013/11/19/that-was-fast-facebooks-webmobile-chat-feature-is-now-getting-rolled-out-globally/