[lsiebert]

I recently got a teensy 2.0 for rooting my chromecast, (which it does, roughly by appearing to chain 32 usb hubs, better description at https://fail0verflow.com/blog/2014/hubcap-chromecast-root-pt... )

They are nifty little dev boards, as you can pretend to be a variety of different devices, but the real benefit in my mind is the ease at which you can use the solder pads to build a device and connect it to usb. YOu can dump roms.

The teensy 3.0 is a 32 bit arm processor and has extra ram and flash memory, which is certainly an improvement over the 8 bit avr processor... that said the teensy 2.0 or 2.0++ might be better if you have arduino experience. Both are great boards to play around with, and I expect lots more exploits based around pretending to be various usb devices.