I used to work for the trade group that puts on that show. The National Truck Equipment Assoc. (NTEA) The show is mainly for compaines up fit trucks, cube van bodies, dump beds, snow removal equip, landscaping equip bodies, ambulance builders, wreckers, roll backs, etc. anyone that takes a bare cab and chassis and adds to it. It is a Big show, it fills up all the convention space in Indy. The show usually alternates to a different city each year, but mainly Indy, and Atlanta because they are centrally located. They have side presentations, the big topic has been alternate fuels, hybryds, diesel emission changes. The OEM usally have engineering staff on had for Q&A. Check it out if you have any interest in that stuff, it's worth while, Josh-