Who are the startups making physical things as part of their business? I've seen wakemate and square... and few others. As a hardware hacker/builder, I'm very,

Who are the startups making physical things as part of their business? I've seen wakemate and square... and few others. As a hardware hacker/builder, I'm very, very interested in startups that make physical things, or need people that make physical things. Right now I work in corporate R&D, and spend most of my day building/rapid prototyping things that will never see the light of day. HN and the startup world feel overwhelmingly software-based... but surely there must be a need for people like me, who can hack hardware and iterate on atoms very quickly. Can anyone give me a feeling of who and where those places might be? I'd like to get a better sense of what's been done and how people are using hardware in this space.