For people interested in other SDR options, I believe these guys were YC funded: Per Vices, <a href="http://www.pervices.com/" rel="nofollow">http://www.pervices.com/</a><p>Their hardware is significantly meatier, supporting frequencies from 100kHz to 4GHz with a bandwith of 250MHz. The HackRF only has a bandwith of 20MHz, and bottoms out at 30MHz.<p>I haven't heard much from them, or discussion about them, but they are out there.