I figure it's about time to give some love to our Google Android team, Android Connect! We've kinda kept it under the radar for a long time, but since we've already submitted our project to google for Phase 1 of their Android coding competition, I figure it's ok to talk about it now.
Our idea was to use the GPS functionality built into Android to allow phones to sense and track proximity to each other. The analogy we used in development was an infection spreading through a population. Not the most user friendly analogy, so the one we submitted under was a smile passed from person to person =). We have a webservice which accepts updates from any device running our Android Connect application, which will then track location, and infection. One of the portions that I'm working on at the moment is building an emulator to simulate a bunch of Android Connect devices roaming around downtown Honolulu. That way when a new user joins up and gives their GPS updates, if they're in downtown Honolulu, they can see their infection spread across the simulated devices in real time.
If you want to check out our Android Connect project, you please visit this website: Android Connect