I use AZSM for my ecu's. On my boat I welded a bung in my header for an o2 sensor and had them run it live on the water. They can set it all up right there on the laptop, I don't see how you just mail in a ecu to someone and have them put a program in it, unless it's bone stock from the factory.
So far, AZSM doesn't have the rights to PCM555 programming. Only MEFI units. It would be nice if they could be the Arizona tuner for Merc. I do like that their 496 intake comes with a new MEFI controller. Program away!