All the information you need is on the coreboot GSOC page and the following project ideas pages:
We are in the Get Familiar period before the Application Period opens. Join the mailing list and IRC #coreboot. Start to get familiar with coreboot, our development process, and with the coreboot community. Discuss project ideas and scope with coreboot developers.
Student Application Period: March 10 – March 21
To be a mentor, you must be a coreboot contributor in good standing (review and commit rights). If you would like to be a member, please add your name to the coreboot GSoC mentors section and signup and connect with coreboot in melange.
Feel free to contact me (IRC:marcj) if you have any questions.