Calm down with the leakings, they will happen when they happen. There most likely wont be anything until after the official beta from Microsoft.
A beta is just like a build but then more well known, doesn't means it leaks. When the dev preview got signed off wasn't it leaked..
Also, when it does sign-off, and if it DOES leak, it doesn't mean the beta build will get leaked, you might get an old build. You never know. Like I said, they will happen when they happen.
CES Microsoft puts the information out to the beta - the download for all users but only follows later. ??? Even downloaded the beta but can be later: The public version is only in February distributed - an exact date is not known yet.