http://www.guildwars2guru.com/news/633-curses-july-bwe-beta-key-giveaway/page__st__40/ (http://www.guildwars2guru.com/news/633-curses-july-bwe-beta-key-giveaway/page__st__40/)
Not sure how many will be left. Just use your Zybez login to get one.
No Prizes remaining :<
Unlucky ALL MINE