As previously reported, this weekend the Fillmore in San Francisco will host an event to mark the birthday of celebrated concert promoter Bill Graham. Graham, who died in a helicopter crash on October 25, 1991, would have turned 75 years old this year. On Saturday, Mickey Hart, the Neville Brothers and Jackson Browne are all confirmed to participate at a show which will benefit the Bill Graham Foundation. However, a second performance has been added which, in addition, will mark the 40th Anniversary of the Merry Pranksters Fillmore Acid Test. Slated to appear at the Sunday night show will be Tea Leaf Green, Samantha Stollenwerck and Eric McFadden along with members of ALO, Hot Buttered Rum and The Ritual. One can anticipate that some Pranksters will be on hand as well.