Machine Learning and GsoC 2011

Recently I began to read a book called "Programing Collective Intelligence" and it's really interesting to me. I decided I want to get into the ML world and I think the GsoC 2011 would be a great way to help me do this. So I'm looking for ML open source projects that are likely to participate in the program in order to know them and make a "pre-selection" of the ones I'd like to participate. I'm an intermediate Python programmer so it'd be great if the project uses this language but I know Java is very popular in ML projects.