Certainly no slap over the wrist from me - it sounds great, Trent! Please share.
I did something vaguely similar a few years ago when teaching a web programming course - the student's "answer" was an URL of a website they'd implemented, and the template code then explored and graded their site. And like you, I had to punch holes in the firewalls to make it happen.
I'm only a control freak with regard to CodeRunner itself - the more uses you can find for it the better, as far as I'm concerned :)