Talked with the store manager and the guy I've seen at my GS the last few times I've been in asking about Pre-purchase and whatnot.
I first asked if they had anymore information about the GW2 Pre-purchase, which sent the kid on a typing frenzy on his machine, and while he did thatn I talked to the manager. The manager was adamant that as a PowerUp Pro Rewards Member(silver card) that I'd be seeing the beta key in my "My Digital Locker" section of my account on poweruprewards.com. I didn't think to ask about any non-pro member. Whenever I used the words "pre-purchase" instead of "pre-order" he'd say pre-order. And when I explained the difference of opinions the community has been getting from GS about how the beta keys were being handed out, he said something to the effect of "it's not our fault, it's HQ's." I agreed and said that it's the responsibility of the distributor's and the retailer's to make this process as smooth as possible.
At which point the other clerk finally had something printing from his register which indicated a SKU but the inability to actually print out what the SKU was for, which was purportedly the BWE key. I hadn't read most of today's replies in this thread before heading to my local GS, so this isn't really a surprise, but I haven't seen/heard about the poweruprewards thing coming into play. I sincerely hope they choose one method of delivery and stick with it, be that receipt, code box, or e-mail.