The organization called NESBA is no longer in business. But the folks that ran that organization started a new venture called N2. East coast only, going pretty far down south to GA.
Tracks:
- Road Atlanta
- VIR North, South, and Patriot
- Summit Point Jefferson and Main
- Pocono (bunch of configurations)
- Pittsburgh International Raceway
- NCBike
- Dominion Raceway (when it's built)
- NJMP Lightning and Thunderbolt
http://www.n2td.org/