[dcb]

Nope, no usb port. The bootloader was a liability where reliability was concerned (code sitting around waiting to overwrite itself) and the additional hardware detracts from the complexity/cost/durability equations for the vast majority of users.

The chip is not locked from further programming though, plenty of folks have figured out how to program an atmega, but it is out-of-scope for the opengauge proprietors to teach it.