For those of you who didnt get a chance to try this out last time there is one more chance before its general release.

Major Nelson has all the details on his site. He has the following to say -

 " I mentioned this on my last show, but now it’s time to make it happen. This week we took a look at the list of the thousands of Xbox LIVE members that originally signed up for the preview program and decided it’s time to add more members. That means that on November 8th (tomorrow) we’re going to be adding more folks to the New Xbox Experience Preview Program.  If you are chosen, you will receive an email later tonight  (check that spam folder!) followed by the update tomorrow evening (PT). We’re only pulling names from those that originally signed up (there is no way to sign up if you missed it, sorry) and this selection process will be at random from those that previously filled out the Connect Program Survey from my original post.  The New Xbox Experience will be available to all Xbox LIVE members on November 19th. "

Source