Fannish stuff (a lot of Top Gear/James May) on tumblr: http://slash-girl.tumblr.com/
Fanfic page on AO3 (I'll also post my fic here, too): http://archiveofourown.org/users/slashg
Twitter, infrequently updated: https://twitter.com/slashgirl (feel free to follow me)
Blogger, for work related stuff, including ranting and I'm trying not to have it too connected with fannish stuff: http://slashgirl71.blogspot.ca/
Oh, and I am on dreamwidth but tbh, use it less than LJ: http://slashgirl.dreamwidth.org/
I am on fb, but that's mostly for me to keep up with the family....
I think that's pretty much it.... I do miss the old days of LJ. Now, it really feels like a ghost town. :(