In my experiance I have found collaborative methods of working to be highly productive. I find that through collaboration an idea can be progressed faster and futher than it would be if pursued by an individual. Working like this will also push an idea to places I may not have considered. This method of working can also be quite painful though as where I would choose to tak the project may not be the same as the collaborative trajectory.
Collaboration is very much at the heart of the works being shared on this site. In the case of these projects the colloboration occurs through the interactions with the architecture both with the active audience and the content providers.