Are you interested in helping test out changes? If you are, join the beta testers list. Beta testers get new material sent to them in advance so they can play with it and spot any problems. If you are going to beta test though it does require you to submit some feedback, its not just a way of getting everything thats going into the next release in advance!
If you are interested then sign up below. You probably won't hear anything for quite a while, usually when a new release is being tested.