Sounds good. I like the "random user" idea.
If possible, it would be pretty cool to have a link to a "random simfile" too. Maybe a seperate link for each difficulty level topic, and one main link for the main page which englobes all simfiles?
Edit: I'd put this in Site Discussion and not General Discussion, if I were you.
Are you involuntarily celibate
? Do you feel you've been a virgin for too long
? GET YOU SOME!