Often we like to highlight mashups that offer useful features such as searching for a new house, planning a vacation or saving on energy costs. Sometimes though, it's nice to use a mashup for no other reason than it is fun. Today we'll look at several gaming mashups that allow users to take a quiz, conduct a treasure hunt and even modify Minecraft.
Gowalla, Foursquare, Yelp, Facebook Places, the list goes on. There's certainly no shortage of methods to tell people where you are and what you're doing while you're there. Startup Whatser, built on the SoGeo API for location-based apps, has jumped into the ring with a different approach to check-in services: to be useful.