In no particular order and by no means comprehensive:
(items with links are available for free online)
Books:
Eastern Standard Tribe, by Cory Doctorow
Everything Bad Is Good for You, by Steven Johnson
Mindscan, by Robert J. Sawyer
Albums:
Audioslave – Out of Exile
Ra – Duality
Harvey Danger – Little by Little
Movies:
Sin City
Batman Begins
Serenity
Kung Fu Hustle
Games:
Mario Kart DS (Nintendo DS)
Burnout: Revenge (Xbox)
Guitar Hero (PS2)
Gun (Xbox)
Urban Dead (online)
(And an honorable mention to Halo 2, which I still play on the Xbox just as much as when it was released in November ’04)