All of this stuff on this board was collected during the 2008 Penny Arcade Expo in Seattle, WA. Each button represents a different gamer from the Penny Arcade forum. During the event we tracked each other down and traded our specific button. It was a ton of fun and some of the buttons are really sweet.
The first Fallout 3 card is an advertisement placed in the bag of stuff you get when you first get into the event. The 2nd card was given to me during the Fallout 3 special demo panel. Each panel attendee won 1 out of 6 prize packs. These included signed and unsigned posters, puppets, the game, and a couple other cool things. The survival guide show in the bottom right corner was given away at the Fallout booth.