President/engineer/entrepreneur, Dangerous Prototypes
Lesnet is leading the industry in creating open-source hardware. He runs Dangerous Prototypes, whose Bus Pirate has become extremely popular among hackers/makers, as well as professional engineers. Through Dangerous Prototypes, he has proven that a fully open environment for hardware development is a viable business solution and can be looked up to by makers everywhere.
Seriously, though, it's interesting to learn about the work all of these individuals are doing. It was great to see a college student on the list -- especially one who is going to school while working full time.
It would be great if there were more women on the list, but unfortunately, I think this reflects the relatively low number of women in the engineering, especially electrical and mechanical engineering. Hopefully, in coming years, we will start to see a greater proportion of women on lists like this.