Yes, realtors do make money on short sales. Realtors really will not notice much difference between a short sale and a regular sale, except that the process is a little bit different for a short sale. If you find that you owe more on your home than it is actually worth on the market, then short selling might be the best way for you to get out of it. If you plan to short sell, here are some suggestions.
First, find a broker or realtor who specializes in short sales. Second, contact your lender, and see what their policy is on short sales. If they are willing to work with you to negotiate a lower balance, then that is good. Some will, and some will not, but it is worth a try. And third, make sure to do your research! Have the value of the home appraised, find out how much it is worth, and see what it is going to take to get out of the situation.
You should definitely be able to find a realtor to help you because realtors actually make really good money on short sales (especially with real estate markets as slow as they are right now). And your lender will likely help you out too because they do not really want to foreclose. Foreclosure often leads to a loss for your lender, as well as for you. But a short sale might help everyone to come out on top.