Hate to break it to you, but even if they list it as Alpha, consider that incorrect, they are all betas, regardless of whether buffalo decides to name it alpha or not. These builds are all based off the dd-wrt SVN tree, which is in currently a beta state, if i had to advise you, i would say go by build number only, not by title, only time you need to go by title is when you start seeing RC1, RC2 etc. The current nightly build of dd-wrt is @ build # 17949. When the dd-wrt SVN tree produces a final, believe me, you'll know it because the community has been waiting on this for some years now.