If you are interested in a school, they will likely have an explanation regarding their early action/decision procedure. It's not necessarily the same across the boards (as some are binding and others are not). My suggestion is to get a list of the schools you're interested in and check up their ED policies.Some schools guarantee grants if you are accepted ED (I believe GW is one, but I could be wrong). So, just be certain you know the specifics about the schools YOU are applying to.
It's true, tempers get shorter as the season progresses...In defense of PSU and Non Parata:Rule of thumb for would-be thread-starters who are NOT interested in receiving a boat-load of sarcasm in response: do some of your own research first. The information really is out there to be found; it's not even that hard to find. Most schools are in the business of making sure you can access the information you need. No one's hiding the ball. And every single school, if they offer any early action option at all, will very clearly notify you of their policy on the application. You don't need a reference guide.