The EXT port has 2 serial ports, both of which can be reconfigured to GPIO. They aren't just serial, they're 6 extra buttons or LEDs you can slap on wherever you want, 4 of which are PWM capable for variable brightness LEDs if you want.
Oh man, now I'm sold. I'll take one!
(don't worry about this being my 1st post: I've got an order in somewhere near the end of the first batch and have been lurking for a long time )
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