Over at Neil Young's website, there is a section titled, "Living with War Today." Included is a set of protest songs submitted by various artists around the world. The most popular song on the site at the moment is "Bring 'em on" by John Hughes. Here is a link to the audio, and also a link to the video slide show. Sample lyric:

Here comes the commander- in -chief
Here comes the commander- in -chief
All the way from Washington Deceit

Where the Oil is thicker than blood
How many lives to the gallon now, bud?
I was born just fine the FIRST time
Can you tell me sir…who ya got next in mind?

Check out other songs on the Neil Young site here --and also the protest videos here.