I just heard a talk with Sproutling's CEO Chris Bruce. He really recommended reading this book: http://www.amazon.com/From-Concept-Consumer-Ideas-Money/dp/0...

You should also attend the SF Hardware Startup meetup, run by my friend Nick Pinkston (great guy): http://www.meetup.com/HardwareStartupSF/

You should also come and join us at the Hackendo::Integrate conference in April: http://hackendo.techendo.co/