In November of 2007 Google announced a contest «Android Developer Challenge» with a $10 million prize fund.
The task for participants was to develop the best application for mobile phones. All kinds of applications were acceptable but innovativeness and utility of developing applications were in favor.
Social networks, operating with information (e.g. pictures), å-mail, IM/calendar, games, news, re-thinking of interface are among the spheres of the application development.
The registration of participants was held from January, 2nd to April 14th at code.google.com