I got classroom training from Home Energy Tune-uP® - A Leader in Residential Energy Efficiency , but never did any audits. The training was great, though, so it was worth it. Come to think of it, maybe it was free.
They have a web-based reporting system.
They were trying to sell the idea of an add-on to the home inspection, which doesn't make sense to me. A significant fraction of my inspections go south. Why would someone spend extra for an energy audit on a home they may not be purchasing?
I could do them as stand-alone, but I don't think they pay well enough to take time away from home inspecting.