The beta will begin on February 15th (so it won't be available until then!), but we have some keys to get you ready for the event. Simply head on over to our giveaway page, click "Claim Your Key" at the bottom, and go to this link to redeem your code. You'll need to register for an account on their site and click on "Apply for Beta" to complete the process, but after that, you'll be all set for the February 15th beta.
