Today, your toothbrush cannot scold you to floss more. Nor can your smart phone actively seek out new mobile social networks in real time or enable ad hoc gaming with other people in your immediate location. It seems almost utopian to imagine a world where junk mail and spam are replaced by location-based, opt-in advertising. These ads would be proactively delivered by intelligent software that knows end users’ interests and needs. A world in which autonomous, intelligent devices communicate, collaborate, and network is a concept hitherto relegated to the Sci-Fi channel. Yet with recent breakthroughs in intelligent middleware, collaborative device communities are possible today for the developers bold enough to embrace this new world vision.