This question came up on the private mentors list, and I want to
publicly clarify since this may be confusing for many folks.  In
reference to this FAQ:

http://code.google.com/support/bin/answer.py?answer=60330&topic=10728

The plan is for Google to create infrastructure for all of our GSoC
students to upload their code to the Google Summer of Code project
repository: http://code.google.com/p/google-summer-of-code/

Students will ultimately be responsible for submitting their code to
this repository.  However, we are still working out how we want to
create this infrastructure, so until such time as we get this taken
care of, that requirement will not hold up payments, etc.

In the interim, we asks our mentors to work with their students to
make sure that a copy of their code is available publicly.  It is
perfectly fine to just have a site that serves out tarballs, or
whatever else makes sense given your project's structure and the
student's individual project.

Hope this helps.  Any questions, please feel free to bring them up on
the program discussion list.

http://groups.google.com/group/google-summer-of-code-discuss