Protonotes is an ingenious tool that allows users to discuss business requirements and to make notes directly on prototypes without the hassle of having to send files back and forth through email.
Protonotes are notes that you add to protypes that allow project members to discuss things like system functionality, design, areas in need of work, and pretty much anything else. The designers have likened the technology to a “discussion board in direct contect of your prototype.” Only one user needs to register, which is a very simple process (email only). After that user has registered, others can access the prototype without having to register simply by visiting a unique URL. For a real quick demo of the technology without the hassle of registering, click the demo on the homepage.
Protonotes provides a service that would be useful for a very specific crowd. I think that the developers realize that, and have targeted those who use prototypes. However, I could envision other uses of this service. I am really disappointed that the site does not work with Firefox, and I imagine the developers understand the need to make Protonotes Firefox compatible. The notes work quickly, they are graphically clean and have a nice transparency. Overall, I like this service and I recommend those sharing prototypes to give it a spin.