Korg just keeps bringing out some excellent toys for synth geeks. Now they have started collaboration with littleBits, a company making open-source modular circuit boards that can be connected like legos. That's right, Korg is now making open-source synth modules. They've released the monotron schematics already a while back and seems like it worked out just fine for them. It's great to see a big company like Korg embracing the DIY synth community like this!
Read this great article on create digital music for more info on the littleBits + Korg collab.