http://photos.americanlemans.com/ads/2011_Schedule.pdf
Mosport was moved as well. The date has been moved forward one week to July 24th. (Note; a week after IRL in Toronto)
That three month break is a killer. I hope that they consider running a spring Road Atlanta date, just to try and fill the gap.
It probably is cost prohibitive, but the IRL is visiting Brazil May 1st.
I would be they really are upset they've moved Laguna back to the fall now.