I love me some Twitter - it is social media where you can still be anonymous. I don't post, but I use it to keep track of stuff.
I think FTM vloggers and bloggers mostly stick to stuff like Tumblr and their own blogs from what I have seen. The only trans related sites with twitter feeds I have found are news related - I follow stuff like the HRC, GLAAD - Huffington Post's GLBT twitter page is surprisingly alright sometimes. @TransEquality is another one. There seem to be quite a few that just retweet trans-oriented new stories.