Here's the official announcement of the just revealed plan to release Duke Nukem Forever on May 3, 2011 in North America, and May 6, 2011 in Europe. This includes word on how to qualify for the demo: "Players looking to get access to the Duke Nukem Forever playable demo before it is publicly released can join the Duke Nukem Forever First Access Club. A membership certificate for the Duke Nukem Forever First Access Club is included within the Borderlands™ Game of the Year edition, where customers will be able to experience the definitive, value-packed collection of the critically acclaimed and best-selling Role-Playing-Shooter that has captured the imagination and attention of single-player and cooperative gamers around the world." The press release is accompanied by new Duke Nukem Forever screenshots (along with the box art), as well as the Duke Nukem Forever "reveal" trailer, which includes gameplay footage from the shooter sequel. The clip is embedded below after you show your ID to our vigilant digital doorman.
The artist who did the original Duke Nukem box art is my friend. I am biased, but this new box isn't in the same league. A little known fact is he modeled Duke's face after his brother, who now is a lawyer.