The application period for GSOC is now open (as of March 23rd). You can find the llvm application here: http://socghop.appspot.com/org/show/google/gsoc2009/llvm
All the information is on that page, but here are a couple of things you should be aware of.
- All applications should be discussed on the mailing list before submitting your application.
- It is suggested (not required!) that you contribute to LLVM prior to submitting your application to demonstrate your committment to the project.
Good luck and we look forward to seeing your applications!