Sorry it took so long but I didn't realize this your post was an open question.
Anyways, I'm not sure. I've had some luck finding source code examples for the more obvious stuff like email from Excel and creating workbooks.
I know that all of us have the ability and tools to create the KB stuff but it takes time to do on top of the normal business. My guess is that the ones who know are so busy doing code that they don't have time.