Using OneNote for blogging is possible for those that have server space with WebDAV functionality... More...
I use the software OneNote from Microsoft a lot when i work. It has features for documenting what one does in a really nice integrated way. It is useful to remember processes with many steps, where the first time one tries there are a lot of trial and error. Keeping track of the errors is... well since i have the memory of a goldfish: next time i do something I don't need to repeat the errors. I take a massive amount of screen dumps in sequences, so i don't need to write everything down. This way I can keep up the work flow but still be documenting.
OneNote 2007 has this interesting little featur "Blog this". Choosing this option for a onenote page brings up the same page in Word 2007, and it is possible to, with a few simple steps publish it. It works perfectly fine for text, but not so well for pictures.
One need to specify a location (called Image Provider -> Own Server) where the image files can be uploaded to.
It does not work to use Flickr. The Flickr help forums have several posts where users try to work out how to do it, but no solution is posted.
It does not work to specify an account on any FTP server either.
Turns out one need to have access to space on a server that uses WebDAV.
Microsofts pretty unhelpful support page
Brandon Siegl's post explaining why it is rare someone manages to get it to work.