SB Nation has been holding live mock drafts annually for several years. It originally started at the SB Nation site called Mocking the Draft but then moved to other blogs that graciously had some members who hosted, tracked, and moderated the event. Last year Behind The Steel Curtain held the event and Music City Miracles has sponsored a couple of years. There probably were some others too but I cannot remember.
This year the event was graciously sponsored by our friends over at Big Cat Country. We did the first round on Saturday March 23rd starting at noon.