Spotted out in the wild, Amazon's Destiny listing notes that pre-orders will received a beta key for all platforms. I'm going to classify this as massively cool!
Help support the site and pre-order Destiny from Amazon!
Pre-order "Destiny" and receive access to the upcoming beta. Beta will be available in early 2014 on the following platforms: PS4 system, PS3 system, Xbox One, and Xbox 360. Limited time only. While beta codes last. Internet connection is required. Amazon will email you your beta access code within 1 business days of you placing your pre-order. Offer valid when shipped and sold by Amazon.com. This offer will be extended to all existing pre-orders. Limited to one per customer order. Amazon reserves the right to change or terminate this promotion at any time (restrictions apply).