Good implementations of reinforcement learning?

For an ai-class project I need to implement a reinforcement learning algorithm which beats a simple game of tetris. The game is written in Java and we have the source code. I know the basics of reinforcement learning theory but was wondering if anyone in the SO community had hands on experience with this type of thing.

1. What would your recommended readings be for an implementation of reinforcement learning in a tetris game?
2. Are there any good open source projects that accomplish similar things that would be worth checking out?

The more specific the better, but general resources about the subject are welcomed.

Follow up:

Here's the solution (code and writeup) I ended up with for any future students:

Paper / Code

Take a look at the 2009 RL-competition. One of the problem domains is a tetris game. There was a tetris problem the year before too. Here’s the 52-page final report from that year’s fifth-place finalist, which goes into a lot of detail about how the agent worked.