Unfortunately, BuddyPress’ application to be a mentoring organisation for GSoC 2013 was rejected. We’d like to thank everyone who helped put together the application and ideas pages, and those who volunteered to be a mentor. However, WordPress got in!
If those people would still like to mentor a WordPress project, or you’re a student and you’d like to work on a BuddyPress project, then I’d encourage you to applying as a mentoring or student to the WordPress project. Check out make/core for details.