We created a USB Host Expansion Board for the PyCom dev modules. You can read more about it on the PyCom forums: https://forum.pycom.io/topic/2979/first ... by-semireg
Thank you to everyone here that makes MicroPython possible. The technology surrounding uPy is the most exciting (and enabling) I've used in a long time. We are a team of mostly iOS/Android mobile app developers. Getting down closer to hardware has been invigorating.