bunnie has a long history of doing really cool things in hardware hacking, his book Hacking the Xbox is a great read (he has another book in the works too). bunnie and xobs presented a complete tear down and reverse engineering of sd cards at 30c3, at 33c3 they were back talking about their education project chibitronics.
bunnie's talk is about the project it self, technical design and motivations, if the front matter of the talk turn you off believe me when I say it is worth powering through and watching the whole thing.
xob's presents an excellent session of bit banging out usb from a low power Cortex-M0+ microcontroller. This talk is a great introduction into the low level details of the usb protocol.
Reading: Babylon's Ashes
Aberdeen, Scotland: 1°C, Light rain overnight.