But then again, if your target user is the weekend experimenter type home/hobbyist it makes things perhaps easier for the novice if there's USB. I would bet there is a lot of folks wanting to increase their Arduino knowledge base with a feature packed but small Xbee enabled board system like this to use for dev , not just me.
dht22 digital temperature humidity sensorSD card can use 12V or USB powerXbee2 RealaysI2C port4way Dip switchRTC clockalso usb Coms pulg in
now i have pads to solder wires on where i need them.
How come there's no thermal relief on the 2x7 header GND pins?
what do you mean By thermal relief ?
EDIT: I just noticed, no mounting holes, people will crucify you for that
Maybe you could add the 2x3 ISP