The Rock and Roll Hall of Fame is celebrating its 25th anniversary with two major concerts at Madison Square Garden on October 29th and 30th, featuring iconic artists like U2, Bruce Springsteen, and Aretha Franklin. Proceeds will establish a permanent endowment for the museum, while a four-hour HBO special will air on November 14th, 2009, along with a dedicated Rolling Stone magazine issue. Sponsorship opportunities include branding rights and promotional benefits, enhancing visibility for supporting brands.