In this very short video clip (the last few minutes of his talk at SXSW this year), Gowalla’s Josh Williams talks about the importance of contribution. If we’re only creating apps and using game mechanics and location-based services (LBS) as a way to increase our social klout and play to our online egos, then the real value of these services will never be realized. The take away is: use these tools for the greater good and to make a difference in the world.