These guys have a very cool mock draft feature over at sportingnews.com
It is great to see where guys are ranked and what guys seem to be the best guys to get at each position. Greak way to do some homework for your drafts. I've done about 1 mock a day for the past 3 days!
I tried Antsports, but it took days to do drafts. Sporting News is live online and I've only ever had 3 missing guys pick. Usually the draft room is full and there is a chat option which is good to bounce off thoughts on players etc.