Ask and ye shall receive
AJ has been working busily on the documentation of the OneNote DataImport APIs. This morning, he posted an early draft to his blog. (Introduction here, as well as our complete XML schema.) Hats off to Andrew for his incredible work on this! Go show him some love. :)
I'll try and post some more complicated DataImport examples here in the near future, and I'd also like to talk about some of the design decisions that we went through, various tips & tricks, etc; but until then -- what questions do you have?