2012 TED fellows great list of folks, two of them are very familiar to the open-source hardware community!
Ayah Bdeir (Lebanon | US) – Engineer + artist
Lebanese artist, inventor and founder of littleBits, an open source system of pre-assembled circuits that snap together with magnets — making learning about electronics fun, easy and creative.
Bre Pettis (US) – Maker
Inventor, maker, and founder of MakerBot Industries, a company producing the Thing-O-Matic, the first affordable 3D printer.