I've been asked by a couple people about some of the bumpy edge lines (pen and ink type lines) I've messed around with in photoshop. I have a download link of some of the brushes I've messed around with the most. Feel free to adjust the brush settings to your needs...
Feel free to comment here and tell me what you think, what works and what doesn't work. It would be cool to see a link to a drawing you made with the brushes. ENJOY
DOWNLOAD .ABR HERE
(I saved this brush set in Adobe Photoshop CS5, It should work fine in CS4, and CS3...tell me if it doesn't)