The Open Beta Weekend for World of Tanks: Xbox 360 Edition is now active and will last from today to Sunday, November 10th, until midnight. You will not need to sign up for beta access to access the Open Beta. However, this is also the last chance you have to register for beta access, so if you don't so by this weekend, you won't be able to get into the beta after the event is over; that is, until the game's full release.
As an extra incentive, all registered beta players who plays the game during the Open Beta weekend will receive a premium USA T14 tier II heavy tank at launch. Anyone who can play five battles between 5-8pm PST on Saturday, November 9th, may also receive a premium USA Ram II Tier V medium tank at launch. Last but not least, there will be a Double XP weekend from 2am PST on Saturday to 2am PST Monday on Monday.