Steven Johnson, the author of Emergence, (the book that inspired me to start thinking about Emergent Democracy) recently blogged about grassroots political ads created with desktop tools. He created a cool quicktime mock ad for the Clark campaign and later Sean created a version with music and voiceover. Steven created this with iPhoto and Keynote.
Very cool use of desktop technology and weblogs. I hope we see a lot more of this stuff. I particularly like the collaborative aspect. Steven, you should put a creative commons license on your ad. ;-)