Right now only Analg header has power with it, +5/Gnd there should be easy to swap.
The rest have the header, and the header duplicated with Gnd next to it. See Reply #8.
I think there is room to move the gnd header out, just not sure if 5V can be routed in between as it has to cross all the signals going out to the screw terminal holes.
Is there a standard for I2C?