Just like the post title says, I'm on Goodreads now. Yup, I finally caved and got myself an account. I'm still figuring stuff out, but the statistical information alone makes me wish I'd gotten an account sooner. Plus, I love being able to easily compare my reading tastes to that of other users.
So far, I've only posted my most recent review. I've rated all the books I'd previously privately rated, which means everything I've read in the past year plus all of the e-books I've read. The only things I haven't included are audiobooks, since my ratings for those tend to be very influenced by my opinions about the reader(s). I may go back and add them anyway. I'm also considering retrospectively adding reviews to all those rated books.