Facebook has just announced Facebook Hacker Cup 2011 which is a annual programming contest open to hackers algorithms worldwide that is online but with a final part of the top 25 at the headquarters of Facebook in Califormia with all payments and awards of up to $ s5.000
When? Registrations are open Dec. 20 and three rounds were made in January 2011. The official site is this you can register yourself and then on when registration opens ... do not forget that the first Google Code Jam winners were all over the world:)