Does anyone know where I can find a copy of the sheet music for James P. Johnson's "Charleston," preferably for free, as I assume it's now in the public domain? I'm getting sick to death of playing Prokofiev and other Russian composers.

Some good free sheet music sites (mostly jazz and ragtime, as that's what I'm currently searching for):
http://www.mutopiaproject.org/
http://www.musicaviva.com/index.html
http://www.8notes.com/
http://library.msstate.edu/ragtime/
http://www.trachtman.org/ragtime/index.htm

I suppose I could do the honorable thing and actually buy it, huh?