Sure. Make an app that stores a very large amount of data. A good example would be spidering web data (unstructured), parsing some structure from it, and storin

Sure. Make an app that stores a very large amount of data. A good example would be spidering web data (unstructured), parsing some structure from it, and storing it in a database. Then, do some analysis on it, expose it to the web, etc. The important thing is either to: a) Have a lot of data. or b) Have a lot of traffic. The first is a lot easier to get than the second.