Three scouters from my district are serving on staff at the Canadian Jamboree in 2009.
(They worked at CCJAM07 and one of them is pictured on the home page of the website.)
Check out the website: http://www.ccjam09.com
Apparently, there is some availability for BSA members.
They do operate at the patrol rather than troop level.
(A "unit" is 8 scouts and 2 adults.)
