I don't see how developing a prototype AKG/collette is any different than any other protype, like the Tinybox. Or like Busman's actives. You have an upfront cost, but you expect to sell a certain number of units. If the problem really is the upfront cost, do what Chris Church does and get payment for a certain # of units in advance.
As for more complicated deals, such as sharing of equity/future sales, that is just too complicated, and not really fair fo Jon I would think. As long as one person has the technical ability, and the finances, there is no need to share the profit.
I think the first step is for Jon to come forward and tell us the approximate cost (with and without a suitable box to connect it to), and a minimum initial # of pre sales, if required, to make it happen.
Until that happens, this can be considered "vaporware", or better yet "maybe-ware". We all know it is technically possible, but it is just not happening yet. I really hope it happens, and I honestly thought Jon was moving forward with it, but now I have my doubts.
Of course this is no reflection on Jon or his other business. He ultimately has the choice of how to proceed.
Richard