No, I've never thought of that.
It would probably need a graphics artist to make up something nice. But it could work.
I bet we have plenty of those amongst us.
I did a handout for a gaming store maybe 5 or 6 years ago, I only did handouts in my city, and it helped a bit. It would probably be more effective for this type of game, considering we have players from around the world. Plus, you never know when you have an absolute diehard for battlemaster amongst us that might go ape !@#$ and post those things in every comic book store they know of. I can think of a comic book store in my city that would be perfect for this sort of game, I walked in once and everyone was dressed like pirates playing some pirate card/roleplaying game. I just shook my head and muttered "Nerds" and went to gaming area to grief their battlefield lan servers. I really do feel that comic book stores, hobby stores and nerd dens (cyber cafes) are the perfect places to advertise battlemaster.