I'm addicted to VoodooPad after using it for only two days. This afternoon I hit the limit of 15 pads for the unregistered version, and the application popped up a dialog to tell me so.

I immediately clicked the button to go register my copy, and bought two licenses. A few minutes later I had my registration number entered and I was able to continue expanding my VoodooPad document.

If you haven't tried it out yet, please do. It's such an intuitive and useful application. I'll sure I'll continue using OmniOutliner for structured writing, but the live Wiki mode is really great for me stream of concious writing and building up an organized (but unstructured) set of information, which is a mode I work well in.