In order to receive your quest reward, you needed to return with your completed map to the Brady Games booth between 4PM and 7PM on the second day of the con. A designated person was assigned to "feel your sack", another stamping the map as completed and another with a bag of stones from which to choose. The stones were green, blue and purple -- representing loot quality. Green included a poster, Blue was a Blizzard keychain or the WoW Manga and Purple included the WoW mouse.
The lines moved quickly and participants got to keep all of the quest pieces as well as the reward. Even though it is an obvious ploy to get attendees to visit vendor booths, it was a fun activity that I will do again if offered at the next BlizzCon.