http://www.autoweek.com/article/20081218/FREE/812189976

The hits just keep on coming.

Longtime CART and IndyCar Series team owner Roger Penske--who spearheads the event in his role as chairman of the Downtown Detroit Partnership--informed the Indy Racing League and American Le Mans Series that the race will not be held in 2009. Penske told AutoWeek that Audi's recent decision to effectively quit the ALMS in 2009, combined with Porsche pulling the plug on its factory RS Spyder prototype program--a program Penske's team ran--hurt the race, as did Detroit's poor economy overall.