The DVD will come out in January 2011.
This series of light novels have been published since 2004, and they are known by their high amount of tension, suspense and action. The anime adaptation came out in January this year, and it can even be seen via Crunchyroll.
Durarara! is the story of Ryuugamine Mikado, a young man who has never left his hometown, and one day on the recommendation of his childhood friend, Masaomi Kida, decides to move to the big city, Ikebukuro, entering both Raira High School.
Kida shows the city around to his friend, indicating some popular streets and above all, certain people you should watch for, since it is well known that Ikebukuro is a dangerous city, full of urban legends . Within the city, the most feared person is Heiwajima Shizuo, an invincible fighter dressed as a waiter with an explosive temper.
(Source: ANN and wikipedia)