Yep, I was just about to post that. Here's another nice little bit of info, copied from my post in the Hot Deals thread.
If you use a friend's referral link, make a new account, and buy a game (dont make an account and then navigate away, they track your site usage and wont give you the credit, it happened to me the first time), you get $5 credit toward a future purchase, and so does the person that referred you.
My reference link is: http://www.greenmangaming.com/?gmgr=xucoqubo
So that gets you DX HR for $34 + $5 in store credit to use later. Pretty awesome.