BlackBerry Native SDK Tutorial
Although you need to use only a tiny subset of the full NDK, that subset of useful tools is currently coupled tightly to the much heavier-weight and complicated Momentics IDE and the NDK.
Over the next while, we'll include links and other material to help walk you through how to install the NDK, obtain signing keys (a required step unless you'll never run your app other than on the simulator), and package and deploy your apps on the device or simulator.
Our primary documentation for the Tart project has almost reached a first milestone, and as soon as it does we'll shift some attention back here. Until then, make use of the BlackBerry support forums and other resources to guide you through it all.
Note: one stray thing to consider (and noted here provisionally) is that the NDK includes a copy of Python 2.7 for some reason, and it will likely interfere with the Python 3.2 that you'll need installed to work properly with Tart. Consider renaming python.exe in the NDK to python.exe.unused to get it out of the way. This appears to have no bad side effects...