They are now accepting signups for the upcoming game Kreed. They'll publish a list of candidates on May 1st.

What does a beta tester get other than a beta version release of a game? Usually, the publishers will send you a final copy and quote often include your name in the credits. You also have the satisfaction of giving your suggestions and comments, many of which are taken to heart as long as they are relatively simple fixes.

If you'd like to give it a shot, here is the signup link.