Our good friends John Highlyliquid.com and Kevin Sineqube.com from Columbus, OH spent much time designing a neat little synthesizer. Now they are looking to manufacture some units and release the design as Open Source. We hope that this project will be of interest to you and perhaps even receive your support.
February 2, 2012: The NTH is a fun-to-use, sonically-rich, hackable music synthesizer. It features digital oscillators, an analog low-pass filter, an integrated step sequencer, MIDI I/O, and simple, intuitive controls.
http://www.kickstarter.com/projects/holland/nth-music-synthesizer
Upon successful funding, production of the NTH will begin and the entire design will be open-sourced.
Audio examples, product photos, and additional documentation can be found at the NTH website: