Update from Amazon today: Pre-order Bonus Offer Order Rift or Collector's Edition by 2/28/11 and get access to four beta events scheduled between 1/7/11 and 2/22/11. Key codes will be emailed to all qualifying pre-orders by 1/7/2011 or within two business days of placing your order. You'll also get the Amazon Exclusive Crystalline Rune Weapon Enchantment,and your choice of an in-game pet: Cockatrice Chick, Deep One Spawning, or Hellhound Pup. Offer valid when shipped and sold by Amazon.com, and is limited to one per customer. Amazon reserves the right to change or terminate this promotion at any time.
Source: http://www.amazon.com/gp/product/B004HKB0XA/ref=oss_product