Pixie Hunt is a mobile location based game from Microsoft making a debut at next weeks Where 2.0 conference . Various teams armed with a Cingular phone, a GPS puck and a Flickr account will compete. As the term  "scavenger hunt" imples, the goal is  to photograph certain tasks such as " a man in a scarf" and upload the pictures to Flickr along with the software's geo tagging functionality. The team with the hightest score wins, explains the O'Reilly Radar.

"You load your Windows Mobile 5.0 smartphone or PocketPC cameraphone, sign up for an account on Flickr and a group text messaging service, then wait for instructions.  Your phone will download a set of tasks like the examples abooad the application on yove and you're off.  Each time you take a photo against a task, it's automatically uploaded to Flickr and tagged. Then all the other team’s phones download it and show it in the game. 

The effect is, you get to see all the photos the other teams are taking as they take them, plus you can "smack talk" with the other teams with the integrated group SMS service.  The application takes care of basic housekeeping, like keeping score for you and organizing the pictures based on which task they were taken against. "

The goal is to fine tune and further develop the software so the prototype can lead to more interactive solutions for smartphones running the Windows Mobile platform. Scavenger hunt is just one of many upcoming applications in this area and so far testers have loved it. Go check it out!