From the grassroots comes the most effective anti-McCain ad I've seen so far this year:
You know the drill: forward this video to everyone you know who can use a computer (i.e., people not like John McCain).
UPDATE: Thanks for the recs, but also thanks to kossack cartwrightdale for creating this ad and sharing it with us in a previous diary. Here's his tip jar -- go fill it up.
UPDATE: Some ideas percolating in the comments about trying to get this ad on TV. I've got little to share on that front, but if you have some ideas please dive in.
UPDATE: Digg link!