Also:
http://playstation.joystiq.com/2010/04/21/first-rock-band-network-tracks-coming-to-psn-tomorrow/
http://playstation.joystiq.com/2010/04/21/first-rock-band-network-tracks-coming-to-psn-tomorrow/
The first songs from the Rock Band Network to be available on PS3 will be released tomorrow, April 22, 2010. The five selected songs are "some of the most popular tracks" from the full selection:
Individual Tracks (with expected prices based on Xbox 360 RBN pricing)
Flogging Molly - "Drunken Lullabies" (Live) ($1)
Jonathan Coulton - "Code Monkey" ($2)
The Shins - "Australia" ($2)
The Slip - "Even Rats" ($2)
Steve Vai - "For the Love of God" (Live) ($2)