Would you like to sign up for a chance to preview the new features coming to Xbox LIVE like Zune, Facebook, and Twitter. If so then check out the Official site for your chance to take part of the action. Here are some of the restrictions listed on the site:

• We can only enroll participants from regions where Xbox LIVE is officially supported.  Do not sign up unless Xbox LIVE is officially available and supported in your region.
• Completing the sign up survey does not automatically enroll you in the Preview Program. To ensure a good cross section of LIVE members, we’ll review completed surveys and make our selections based on variables such as region and connection type.
• Do not apply more than once. It will not increase your chances of being registered into the preview program.
• To be considered for the program, you must complete the survey and provide your 12 digit Console ID. If your Console ID is not correct, you will not be chosen to participate.
• To register, you will need your Gamertag and Xbox 360 Console ID.
• If you do not know how to obtain your Console ID, please read this article.