George Bush-bashing celebs have joined forces with Moveon.org on a new series of campaign commercials. The celeb-studded spots feature the voices of Matt Damon, Scarlett Johansson, Martin Sheen, Rob Reiner and Ed Asner and star Rebecca Romijn-Stamos, Woody Harrelson, Illeana Douglas and Margaret Cho. Janeane Garafalo hosted Tuesday night's kick-off at Hammerstein Ballroom, billed as "10 Weeks: Don't Get Mad, Get Even!" Howard Dean, Kevin Bacon, Edie Falco, "School of Rock" director Richard Linklater and Al Franken fired up the faithful. Musical guests included The Roots, Natalie Merchant, Moby and Perry Farrell, who joined forces for Jane's Addiction's "Idiots Rule,"...