Arenanet released a blog post detailing what players can expect in Beta Weekend 27-29th April. Included are the time frames (Friday, April 27, at noon PDT (GMT-7) until Sunday, April 29, at 11:59 p.m. PDT (GMT-7)) which gives a maximum 60 hours of gameplay. As before only the Charr, Norn and Human races will be playable in this beta event though the cosmopolitan city of Lion’s Arch has been added.
The only way to absolutely guarantee your access to this or any future Beta Weekend Events is to pre-purchase any edition of Guild Wars 2.
Customers who have pre-purchased the game will receive an e-mail next week with instructions on how to download the client and participate in the Beta.
This is a public event, which means that you’re not bound by a Non-Disclosure Agreement (NDA). So go ahead, feel free to take screenshots, shoot video, blog, tweet, write, or compose a rock opera to share your Guild Wars 2 experience with the world.
Arenanet says hundreds of thousands of players are eligible for this BWE so if you’ve prepurchased expect a treat. If you haven’t, check out buy.guildwars2.com to participate!
 April 19, 4:30 p.m. update: The official Guild Wars 2 page now has a handy-dandy countdown timer on it. In the event that you can’t count the number of days before Friday, consider yourself covered!