I don't think there's much in the way of event promoters suing. Portland has no contract, according to today's Oregonian. The European races are track rentals and contracts may well not be signed. Think Mexico City's contract was up at the end of '07. Houston and Cleveland, Lanigan is fronting for CC, so those contracts are with the city and those cities would get nothing in a Chapter 7.
http://auto-racing.speedtv.com/artic...or-bankruptcy/