Well, I was thinking a post on a personal blog which we then pimp out on tumblr. And get a few friends with bigger follower bases to do the same. Practicalities, though... hm. My first instinct is to say 'something sabriel-themed' because if we were to rope, say, aria and grey in, there's a pre-assembled enthusiastic gang right there (of prompters and authors and promoters, which are the three key ingredients). Though I wouldn't want to muscle in on aria's SFF. But that's the thing - would it be direct competition or would it be complementary enthusiasm? After all, the whole point of SFF is that it's Friday - it's one day of the week, it's ephemeral - which is a very tumblr thing. Things have to be reblogged each week or they don't exist anymore. Whereas a post like the propmt posts is an ongoing challenge and a repository at the same time.