Webcomics, part II

Well, I'm hoping I can get a decent webcomic off the ground this time. Now, I can think up the ideas and draw in the panels, but hell if I have the technical mastery to make it look decent after I scan it in. There's just something that never looks quite right after I scan 'em in. Does anyone have any suggestions on how to smooth lines out, make things look less jagged, etc.? I got the feeling I'm on the right track, but not quite at a publishable quality.

After scanning, shrunken and cropped:
http://mpnqb.moved.in/comic/SCAN0024.png

After using the GIMP to remove the texture of the paper:
http://mpnqb.moved.in/comic/SCAN0024_2.png

Cleaning up and adding in the dialogue:
http://mpnqb.moved.in/comic/SCAN0024_3.png

Haha, that's awesome! :D Good luck, man. I hope you succeed.