Yeah, I would say its something a lot like the new Google Wave that they announced a while back. NotoAir is note-taking software first and a collaboration tool second. First, you use NotoAir to take notes, stuff for like classes, etc. Then, if the note isn't personal you can make it public. So if I where taking a note for a class... I wouldn't have any good reason to keep that only to myself - so I could let other people see my notes. The application (the Air app) started as a simple html/wiki based note taking application that I decided to see if I could turn into an service and maybe eventually a product.