The Guild Wars 2 Facebook page has been updated with the news that all keys for the digital edition of the game in North America have been sold. According to the post, the number of keys available was limited to ensure that participants would have a smooth, lag-free experience.
We have sold out of keys for digital distribution in North America. GameStop and Best Buy still have stock available.
We limit sales to ensure we have enough capacity for our customers. We're likely to have capacity available after the initial crunch at the start of the weekend. Players who purchase when we're able to resume digital sales at buy.guildwars2.com will still be able to play for the remainder of the weekend.
Source: Guild Wars 2 Facebook