10 boxing kind of died when cata came out because of all the movement involved in the fights. With that said, the recent upgrade in armor and nerfs to bwd and bot, I think 10 boxing might be an option with some of the fights in those two places now.

Currently im gearing up some more alts to see if i can 7-8 box these raids with some friends.
so far, i have heard of 3 boxing all of bot, but thats it.