I found out about Jared Polin, "the fro", through Facebook about a month ago. Among other daily posts, he makes youtube videos with his college buddy that are very cool because they do live edits of RAW photos taken by their fans. This is a great opportunity to hear and see other photographers edit from beginning to end using Lightroom 3. There are a lot of posts on his websites, and he seems to be connected to a lot of different mediums of social media such as ustream, e-mail, Facebook, youtube, etc... His fans are extremely active in his forums and he is very responsive to their questions and comments. This is one site I look at everyday.
Check him out on his Facebook page: FROKNOWSFOTO
