I am a member of both as you can see in my sig.
I find xbiz.net to be currently more "alive" and to have the fresher contacts, as it has been around a lot less time than AWW.
But now that AVN has bought AWW, I expect AWW to make a serious "comeback" one of these days.
In any case, I think everyone should be on both of them. We only got 3 working social networking sites dedicated to our industry, so it is not, as if we got too many of them!
