My question was directed to the KADE team, not you, Napoleon. 
While he doesn't hang out here much, Bruno/ Bootsector is the driver of the console inputs and most certianly a member of the KADE team.
The KADE miniConsole+ is the evolution & unification of Bruno's earlier work:
http://www.brunofreitas.comDegenatrons is the other brain of the KADE operation.

I just sit around and look pretty and talk

About converters, we will offer premade cables with the Kickstarter as well as after. We will also provide the pinout so PBJ can go get a 15 pin d-sub at Radio Shack and solder right to the end of his old 3rd party controllers. Folks can but extension cables and cut the ends off to make them too. I'm not sure if we will sell DIY kits with our tiny quick solder converter PCBs or not.
All of this will be open source in some form.
RE beta testers. We have a few but will be getting ready for another round if I can get these guys to stop adding big features! If you are interested, have a supply of retro controllers, and like to try emulating arcade and consoles on a variety of systems, send me a PM.