Alright Zerstörer, you are in. Welcome to the dev team.
You should first get an overview of the development process and get up to speed on the situation.
I will add your name to the to-do list and there you will find what needs to be done.
You should also get x-fire asap, as described in the x-fire thread.
Tomorrow, if you want, I can setup the svn with you and we play a little alpha.
Enjoy!