I have a plain (passive - no prop) servo pcb ~1.8"x1.2" that has a 16pin servo header with series resistors and individual 5V jumpers. See my website for a pic (link in signature). PM me your address if you would like one (normally 10-14 days by post from Oz but its xmas so maybe longer ATM). Alternately, Ken may not be using the one I sent to him if you are close to him. I am also using my Prop BaseBoard1 that this plugs into. Forget if I sent one to Ken too. Anyway I can send you one too if you would like.
My new pcbs are in production but I will not see them here for 3-4 weeks (takes 2 weeks+ for the post)
I have wondered if it would be possible to easily modify the extra channels on the RC transmitter to send a varying pulse width rather than on/off, perhaps as simply just fitting a pot instead of the switch. That way, you could dynamically vary some of the PID values.
Great - I have a Spektrum DX6i so I have a satellite rx. Oh for the time to try it!
I've also done a bunch of reading, and found that the small satellite receivers for Spektrum receivers can be used on their own - they're SPI, and the protocol has been reverse engineered. I plan to write a driver for it so it'll be "as many channels as you have" on a 3-pin JST. That's not a requirement, but it'd be pretty cool.
It is my intention to next design a tiny pcb to control 4 brushless motors with a prop. Two boards can be stacked for hex or octa copters. This way we will have total and fast responsive control of the motors (and feedback of motor revs for logging). However, this is little way off yet.
BTW this solves another problem too... that of power distribution. So the inclusion of the prop should not add any cost over separate cheap ESCs costs.