Today, Xbox LIVE’s  Major Nelson announced that Microsoft will once again be  opening the doors to enthusiasts looking to test the new features coming to the Xbox 360 this fall.

If you’re selected, an update will be pushed to your Xbox 360 in the next few days. The update will contain new Xbox LIVE features, including:

Internet Explorer for Xbox
Recommendations and ratings
Pinning and favorites
Enhanced category search and discovery features
Voice search (in specified markets)
Note: A console in the program is expected to remain fully compatible with standard retail consoles not in the program.

If you would like to participate, please register. You will be required to agree to a non-disclosure agreement (NDA) for confidentiality reasons. Any participant who violates the NDA will be removed from this beta and all Xbox betas moving forward, and will not have access to Xbox LIVE until the end of this beta program period. Our NDA enforcement squad is really good at finding violators; so save us both the trouble and don’t test them. We also ask that you fill out a brief 5-minute survey at the end of the beta to let us know what you think.” – Major Nelson

Hurry and sign up, because once it is over, it is over. You can begin the registration process here.