After all the fuss over Zeitgeist and all the myriad ways in which Billy painted a giant bullseye on his showercurtain-vinyl-cape-thing, last night he reminded a room full of D.C.-area denizens why they still have love for the Pumpkins. Or at least, the moniker. At the 9:30 Club, Billy, Jimmy, John Cusack, and the bassist played their CD release party ...