this is a different article than the one i first saw, but it says pretty much the same thing. this is from about.com. i googled "free comic book day stargate figure."
Free Action Figure on Free Comic Book Day
May 6, 2006 is Free Comic Book Day, a special promotion at most U.S. comic book stores. Participating stores will be offering free comic books (from selected titles printed specially for this promotion) and some will also be giving away an exclusive Stargate SG-1 action figure from Diamond Select Toys. The figure is General Jack O'Neill in a black t-shirt.
Another freebie for Free Comic Book Day is a Marvel HeroClix Wolverine piece. Be sure to check the list of participating stores or ask at your local comic shop to see if they will be taking part in Free Comic Book Day, and also if they will be giving away the Stargate figure and the HeroClix piece. (The comic stores have to purchase the freebie items from the manufacturers in certain quantities, so smaller stores might not be offering the toys.)