Ok,
I just got off the phone with Kieth at Flyin' Miata.com, and from what he is telling me, the kit will probably be available in October. The reason being is that they want to do some heavy R&D so that they have the problems, and the consumer does not. He told me the kit should be between $3k and $3.5k. The intercooler they are using is enough for 8 PSI, and the smaller size means they do not have to relocate any power steering hardware.