This is excellent news. In the West, UPS and FedEx, use ADS-B on most of their fleet. Frontier and Jet Blue seem to have at least part of their fleet so equipped. The rest of the ADS-B activity out here is international overflights into LAX and SFO. On average I only have 5-6 flights on the map in my area with 40-60 showing on Mode-S.
Steve