I also saw on one of the many articles that the contest was only during 1 hour each day, however, no one seems to mention when this hour is. Details about the Chicagoland local Six Flags here: http://www.sixflags.com/parks/greatamerica/ParkPress/Roaches.html
I could do this, already ate a scorpion.
There is also going to be a boiled cockroach eating contest on Friday the 13th against the world record holder here in Gurnee, to win season passes for next year.