The Rock Band Network has gone live on Xbox 360 with a catalog of 105 songs. With over 4,000 registered authors and peer reviewers participating in the program, we're guessing a lot more tracks are in the pipe; and Harmonix and MTV Games have teased that tracks from from Flight of the Conchords, The Smashing Pumpkins, Twin Atlantic, All That Remains, Clutch, Prong, The Gaslight Anthem and hundreds of other artists are on the way. Song prices currently range from 80 to 160 ($1 and $2)*.
A nice new feature of the Rock Band Music Store offshoot is that players will be able to download RBN samples to demo tracks before they buy. Songs will debut exclusively on Xbox 360 for 30 days, after which "a selection of standout tracks" will become available on PS3 and Wii.
*Artists who submit songs receive a 30-percent royalty of the RBN retail price (excluding tax) for every track purchased.
Update: List of RBN launch tracks after the break.