Sajoo's an app to bet on the '10 World Cup among friends. It's part of a large ad campaign to launch the betting site sajoo. The app was designed for sajoo by FaberNovel, which then turned to C4M for an express implementation: it had to be ready before the competition started.

The app is based on rooms, open or limited to circle of friends. Each room defines the set of matches that participant bet upon. Stakes are set freely among users. Anyone can create rooms then invite friends to find out who's the most soccer savvy.