How do you redeem the battlefield 3 beta?

I bought the Medal of Honor Limited Edition on black friday 2010 new, and have put on my online code then. However, how do you redeem and get the battlefield 3 beta? do you have to sign up online or just enter the online code or what? thanks (bonus: when is the beta? is it today?" XBOX 360 VERSION.How do you redeem the battlefield 3 beta?
There are no requirements to participate in the Beta, anyone on any console can play it, yet as for the release date and other info:

The Battlefield 3 Beta (For All Platforms) has not yet had an official release date. Everything you're hearing and reading about now are rumors and are unofficial. Though, for OFFICIAL information and updates about the Beta and Battlefield 3 in general, follow their Twitter at:

http://twitter.com/#!/battlefield

Or keep up to date with the Battlefield Blog here:

http://blogs.battlefield.ea.com/

Note:
If you Pre-Ordered Medal of Honor Limited Edition, or Pre-Ordered Battlefield 3 for PC on Origin, you get 48 hours (2 Days) Early Access from the official release date.

Also, make sure to Pre-Order before October 25th, or ASAP. Pre-Ordering gives you a Free Map Pack, Bonus Weapons (Physical Warfare Pack), and (PlayStation 3 ONLY) Battlefield 1943 for free on the same disk.


Good luck, and we're all waiting for the Beta Release Date with you.