For the past few weeks I've taken a break from my other hobbies and let myself become distracted by Google's AI Challenge.
It's an Artificial Intelligence (AI) programming contest about programming the smartest virtual colony of ants which fight against other colonies for domination.
The matches are played entirely by the submitted programs on online servers and replays of them can be seen online at the website. My matches can be followed here, such as this one.
As mentioned, I've been at it for a few weeks, and my colony is now the 39th highest ranked world-wide out of several thousands, and the highest ranked in Denmark out of 138. :)
It's quite good fun, so I'll try to make a few more improvements, although I'm beginning to run out of ideas. It's tough competition for sure!
If you know a bit of programming, it's easy to get started, and starter packages are provided for all kinds of different programming languages including Java, C#, Python, C++ and more.
Let me know if you're participating as well!