You can see what the short interest is on a stock to get a gauge of how shorted it is. Plus if you have access to one of the online idea boards for hedge funds

You can see what the short interest is on a stock to get a gauge of how shorted it is. Plus if you have access to one of the online idea boards for hedge funds, you can see the write ups from analysts that believe OpenTable is a short -- sometimes they disclose whether or not their fund is short the company as well. I am counting 4 of those write ups right now.