The only invitations that have been handed out far are to those that have won ribs sometime in 2010.
Some of who have confirmed:
Quau - Jack Rib winner
4 Smokin Butts - 4 Rib Wins in 2010
Que's Your Daddy - 2 Rib Wins in 2010
Smokin Joe and Son - won the Wildwood Bash in STL - beat out 90+ teams. (non KCBS)
Plowboys BBQ - North Kansas City winner - beat over 100 teams.
KCBS Certified Judge #21812
1 UDS Smoker
1 Char Griller w/o side fire box
Hog's Wart School BBQ Team
(43 sauces and counting!)