I still say Dreamwidth for the infrastructure, and establish a foothold on LJ with appropriate interests and then an entry/profile that links to all the infrastructure over on DW, so people searching it out on LJ can find their way over easily.

Because there's no established fandom so far, so we may as well make use of the less awful infrastructure while not forgetting that many people search LJ first. I mean, if we're doing an anon kinkmeme, it doesn't really matter a damn which site it's on. And DW is so much less awful for kinkmemes, so. Yeah.

And, I mean. DW's OpenID implementation sucks far less than anyone else's, basically, so people can log on via their LJ userid if they really don't want to create a new account to be able to track threads and have updates emailed (which, new account creation is still open without invite codes, too? So it's not like that's a hurdle, if they'd prefer a native account).