Okay, so Sluggy wasn't the only comic mentioned, or anything, but I thought this was pretty amusing anyway.
http://www.brunothebandit.com/d/20030328.html
Bruno the Bandit is a pretty amusing comic on its own right - and here it gives a nod to some other comics out there, including Sluggy Freelance! Worship the comic.
-Jim "Time to die, nerd-boy!" Fisher