I don’t know a darn thing about VoodooPad (although looking at its features, its sounds kind of neat.) But its developer, Gus Mueller, has written a long postmortem post on his blog about developing the 2.0 version: lessons he learned, stuff he threw out while developing it, good and bad choices he made along the way.
I really enjoy reading this sort of stuff. I’m no kind of advanced developer (well, not much of a developer at all, actually), but I always learn interesting things from these kind of software programmer journals. I love them.