Yes, the quest goes on...though a bit frustratingly so right now. As I told the proprietor of 12th Street Diner a couple weeks back, my current favorite would have to be Chris's Pancake House's slinger.

Theirs comes with pancakes...I mean seriously?! It's very large and comes with a large helping of properly cut white onions.

This post here: http://battra13.blogspot.com/2009/08/st-louiss-perfect-slinger-part-4-chriss.html

This was an early post so the good pictures and such didn't happen, but you get the gist I think.