Haha yeah, mini USB isn't that big of a deal for me. I'll be using a short internal extension regardless and I can just switch the plug type, so not a problem.
I still don't understand about the batteries. I would love to use 2x 18650s if I can fir them, but would there be an issue charging them if they are connected to your board in parallel?
I suspected that board colour was arbitrary, but it's good to have it confirmed.