I've recently been using the dailymile forum to record and post my workouts (dailymile is a social training log for runners, cyclists, and triathletes.). I am still a newbie and haven't really figured out how everything works and all that it has to offer. BUT.... I like what I am seeing so far.
You can check it out on Facebook, dailymile.com, or blog.dailymile.com, dailymileteam on Twitter, and probably a bunch of other places I am not aware of.
If you sign up, make sure to add me to your friend list!