I like it too, but I foresee one major problem.
No insurance company in the US would give a policy for this company due to the safety factors involved. All it would take would be a Pro 5.0 style 2500+ hp race car getting in there and having a blower or turbo explode and it would be all over. Can you say in coming??? Not too mention a N2O explosion. Don't know about you guys, but I for one have seen my share of parts that go boom on super fast cars. Maybe if they put a limitation on HP, or made the stipulation that only street driven, licensed and insured vehicles could play, it might be a little better, but you'd still get those crazy people driving around their Mustangs and Camaros with Super Street Outlaw and 10.5 Outlaw power under the hood.
I really do like the idea and wish we did have something like this, but I see insurance companies and the EPA putting the kabosh on it.
Patrick