I began by asking the question: Can we create an open framework for distributed augmented reality using "off the shelf" standards, e.g., the Google Wave Federation Protocol?
But the implications of this proposal go well beyond augmented reality and towards an open framework for in context mobile social communication.
Also see video here. http://www.mobilemonday.nl/talks/tish-shute-the-next-wave-of-ar/
Clipping is a handy way to collect important slides you want to go back to later.