If you’re a software developer that’s anxious to dig into the world of NOOKcolor coding, prepare to engage. The SDK (API level 7) is available for download from Barnes & Noble. Right now, the developer program is geared towards those with reading-centric apps, but perhaps the doors to social, productivity, and game apps will open up before too long.
If you’re curious about what under the NOOKcolor’s hood, check out this spec sheet. Also be sure to read up on installation and grab some PDFs from the documentation library.