Bling Software is providing a mobile application for the 40/40 Club called the Jay-Z 40/40 Club All Access Pass.

Microsoft is sponsoring Zune Live at the BBQ, a series of concerts featuring:
Common, David Banner, UGK, Mos Def, Bilal, Clipse, Collie Budz, E-40, Cham, and Large Professor

More info at Zune.net.

SanDisk and Guerilla Union are teaming up to offer mobile info and multimedia content related to the 2007 Rock the Bells concerts.