For anyone who hasn't pre purchsed and wants to get a nice discount greenmangaming.com has it for 20% off (voucher is at the the bottom). They have the DDE for sale as well.
The site is an authorized retailer and I can confirm it's legit because... well I got my copy from here .
Just add Guild Wars 2 to your basket, then enter the code in the little voucher area to the right under the countdown timer.
Oh and if you haven't registered yet and would like to link me as a referral, we both get 2$ credit on the site, use this link instead to register.
See you all in game, and if you use my referral link thank you very much.