Like TMK's USB-USB converter, the idea is to minimally add Bluetooth + Li-Po to existing keyboards out there
The design I have in mind is very primitive, you patch the controller + li-po side by side to the underside of most keyboards with feet, for the ones that don't have feet, just put them inside and peek the antenna out - the connectors would be thin ones, and I'm guessing from the # of keyboards out there, the highest demand would be a mini-b solution
A good bonus would be to have reprogrammability like the TMK USB-USB converter
Does it sound doable? Does it already exist?