While the music peripheral craze has died down, Harmonix hasn't stopped releasing Rock Band DLC on a weekly basis. In fact, there are nearly 3500 songs in the Rock Band catalog currently available to download.
Unfortunately, very few of these songs are 20 minutes long. Thankfully, Harmonix is fixing that this week with the release of Rush's seven-part "2112" suite.
Available December 31st on Xbox 360 and January 3rd on PS3 and Wii, "2112" is available to download in a variety of ways. For the more sane psuedo-rockers, the song will be available in three separate packages: one combines “Overture” and “The Temple of Syrinx”; the second features “Discovery” and “Presentation”; and the final track brings “Oracle: The Dream,” “Soliloquy,” and “Grand Finale.”
However, the more ambitious players will get the "2112" pack, which allows you to play the entire song in an epic 20-minute marathon session. The pack includes Pro Guitar and Pro Bass sections "for free," as well.
Each "track" will cost $2, but the pack will be available for $5.49. To see a video of the DLC in action, go to the Rock Band official website.