MTV Games just informed us that the title update for Rock Band -- you know, the one that allows you to import Rock Band disc-based songs to Rock Band 2 -- has gone live.
The update will add an "export disc" tab under the extra options of the Rock Band menu, which will allow users to transfer 55 tracks from the original game to Rock Band 2. The cost? $4.99, or 400 Microsoft Points. Right now, the update is useless -- Rock Band 2 has yet to hit shelves. But MTV Games are also quick to point out that the patch is required for all future downloadable content releases for Rock Band, so get to patching.
No word on which 55 songs are transferable; we've contacted the appropriate persons for said info, and we'll update you as soon as we can.
[Update: Ladies and gentlemen, the three songs you won't be exporting to Rock Band 2 are: "Paranoid" as made famous by Black Sabbath, "Enter Sandman" by Metallica and "Run to the Hills" as made famous by Iron Maiden. European folk won't be able to port over Tokio Hotel's "Monsoon."
Additionally, the update also apparently "lowers the threshold on gold stars, making it easier/possible to gold star songs. This won't affect leaderboards as it only affects the threshhold [sic], not the score. Secondly, it fixes a few songs that had 'unhittable' notes."]
Rock Band™ Disc Export Title Update Goes Live
Title Update Allows Owners of the Original Rock Band Disc to Export 55 Tracks From the Game for Play with Upcoming Rock Band 2
CAMBRIDGE, MA – September 4, 2008 - In an industry first, Harmonix Music Systems, the leading developer of music-based games, and MTV Games announced today the release of a title update for Rock Band on the Xbox™ 360™ videogame and entertainment system from Microsoft that will make it possible for owners of the original Rock Band to export 55 tracks from the original Rock Band disc for play in the soon-to-be released Rock Band 2.
Beginning today, September 4th, the title update will add an “export disc” tab under the extras option in the Rock Band menus, allowing owners of the original Rock Band to expand their Rock Band 2 library to include 55 tracks from the original Rock Band track list for the nominal fee of $4.99 (400 Microsoft Points). In addition, this patch is required for all future downloadable content releases for Rock Band. Previously purchased DLC will not be affected.
The selection of 55 exportable Rock Band tracks joins the weekly downloadable content list of over 200 songs to date and Rock Band 2’s forthcoming setlist of over 100 songs  adding to the ever expanding Rock Band Music Library. By the end of 2008, Harmonix has promised an unprecedented 500 songs will be available for the Rock Band platform. For a complete list of Rock Band songs available for purchase and download to date, please go to http://www.rockband.com/dlc.