For Ruby at least, I just found this blog entry that helps out immensely. It's missing a step, as it assumes you have Rio already, but it was easy enough to figure out.
> gem install rioThen save that Ruby script off locally and run it against your script file. Include the CSS or just add it to the HTML inside <STYLE> tags and you're golden.
> gem install syntax
Of course, the braindead Blogger engine doesn't seem to be picking up the stylesheet, so the code doesn't appear as pretty as it should -- no syntax coloring or anything. I'll have ot figure that out before I post my HTTP load runner script.