[plt-scheme] export code (with syntax and stuff) to HTML

I know this must be possible, since Scribble does it...

If I have a .ss/.scm file and would like to export it to HTML with the
syntax coloring, etc., what's the easiest way to do that?

I'm envisioning a system where students could upload assignments and
then we could go over them in class by clicking on a link that would
display a student's file for group critique. So, step 1 = change
student file into web page.

Todd