I switched a few years ago to a Macbook Air, but I still love using Microsoft Onenote as my database and organiser which I store in my Skydrive.
This is the best (and only) native way of getting Onenote onto OSX without resorting to inferior solutions such as dual booting Windows, or running the slow Onenote Web App.
I just got alerted of the price drop and purchased it instantly. Hope this is a useful app for some Ozbargainers.
The iPad app Outline+ is also on sale, but the free app from Microsoft is good enough in that regard.