I think you would have a shot at a solid niche with the decaf angle. Think about this: At practically every workplace you can get real coffee, which will probably always beat freeze-dried stuff. But if you want decaf you are SOL.

I am currently forced to drink Nestlé Gold Decaf and it is just barely tolerable. I don't know how your product compares but personally I would spring for anything better in a heartbeat, price be damned.