Now these are a great idea. Have you been reading Flashpoint: Batman - Knight of Vengeance by Brian Azzarello and Eduardo Risso? I read the first two issues last night and can't wait for the next one.
Anyway, if you have read it, you know that Flashpoint Batman is Thomas Wayne, Bruce's father, and he owns a casino. To promote Flashpoint at their booth in San Diego this year, DC Comics will give away five different Wayne Casinos poker chips, with a different valued chip on each day:
$1 Chips (White) – Wednesday, July 20th$5 Chips (Red) – Thursday, July 21st$10 Chips (Blue) – Friday, July 22nd$25 Chips (Green) – Saturday, July 23rd$50 Chips (Orange) – Sunday, July 24th$100 Chips (Black) – These will be given away at DC panels throughout the convention to attendees who ask the best questions!