Mythic has created the beginnings of a FAQ intended to help would-be-customers sort out all the details about pre-ordering Warhammer Online. Info included in the FAQ: how to pre-order in Canada, who to poke to get pre-order codes when you place your order through an online store, and details and definitions on the beta testing phases, among other things.
Mythic promises that the FAQ will be updated with new information in the future, but doesn't say what kind of information it'll be.
The FAQ has some helpful information if you have those specific questions, of course. If you want a more in-depth and badass guide to pre-ordering WAR, though, check out our WAR collector's edition pre-order guide. Which retailer distributes codes in the most helpful way? Which one gives you the best extra goodies? It's all there!