Concorde ‘B’
Concorde was a fantastic technological achievement; It's beautiful and revolutionary. My heart really wants it to be successful.However, my head tells me that no amount of tweaking or tuning will change the fundamental problem with Concorde. 
The root problem with this aircraft is that people prefer cheaper flights over faster flights.The real success that we can take from the Concorde program was that some of the technology found its way into the A300 program and its derivative, the A320.Cheap, reliable aircraft are what people want. Fast, expensive ones are cool, but not really economic.