http://news.livejournal.com/116933.html#m
http://community.livejournal.com/feedback/15044.html
This should probably wind up as a new FAQ alongside the one for /mobile, although I'm a little hesitant about presenting it as a finished FAQ when the feature itself is not yet finished. (Though it will probably be easier to start drafting now and have it ready except for a few touchups when it does get finalized.)