hm. How about calling it "Cel Collectors 101" 
and make the write up something simple, like "An 
opportunity to discuss the different types of 
anime cels and sketches; how best to find these 
jewels, and the care and preservation of them."

(plus some killer tag line to spice it up). We 
might get a few folks who wander in, but we can 
handle them informally.

Since it's Sunday, I'm free and can help out 
(and actually have cels on hand at a con for 
once)