There's Aerion.[1] They were going to build an 8-passenger supersonic bizjet. Top speed Mach 1.5, cruise Mach 1.4, price $120 million, first flight planned for 2021. They're still talking about where to build the factory, but they're already taking pre-orders.
Since the founder is in the thread, why did they target cruise > Mach 2 and a 40 passenger size? The business jet segment makes a lot of sense for high speed flight, but this seems like more of a stretch.
[1] http://www.aerionsupersonic.com/