I've run drives in NJ for the past couple years for Music Saves Lives. When you donate, you get a voucher which entitles you to special MSL meet and greets. The MSL restricted areas within the show venue allow donors to meet bands, take pictures and get autographs. At each date, the 1st 100 VIP voucher holders to register at the MSL Booth will also receive backstage access. Also, every donor will receive a 10 song download card.

That is for the NY/NJ dates. It may differ slightly by venue.