I chanced across this mashup on www.boingboing.net of all places. They talk politics occasionally, but usually tech related policy issues.
Anyway, here's a nicely done youtube of this song.
It gets me up and going, it makes me want to keep callin', keep knockin' and keep on goin'
Enjoy!
Please feel free to link any songs that have kept you going over the past 20 months.