It appears that patrons of the 2008 Blizzard Worldwide Invitational will receive an as of yet unnamed minipet as a free gift for attending the show. Additionally, a beta key for an unnannounced upcoming Blizzard title will be provided to attendees (likely either WotLK or Starcraft II).
The invitational is scheduled for Saturday the 28th and Sunday the 29th of June and will be held in Hall 5 of the Porte de Versailles Exposition Center in Paris, France. So... anyone up for an international raod trip?