…as in reading and typing japanese, that is
just wondering if any of you use mixi or filn or pixiv or any of the popular jp-only SNS
sns = social networking service
like friendster/myspace/facebook, that kinda thing
Not me. I’m more of an old fashion go-to-Roppongi (or the various knockoffs of it) type guy.
Westerner dudes go there to get Japanese chixs, and Japanese chixs go there to get Westerner dudes. Win-Win one nighters. 
Filn had this cute commercial that caught my eye last year though:
http://www.youtube.com/watch?v=SFrjR07GhJM
Has nothing to do with the actual site though. 
well the only reason i am mentioning this is because alot of them (well, at least the ones i listed) are quite anime/game-focused and you can join anime/game related communities, thats all
ADD:
and not to mention that jp industry people do use them too
I use mixi.
My (written) Japanese isn’t quite good enough to join those sites.