I’d like to point any potential Google Summer of Code applicants to a post on DOs and DON’Ts for students over on the Google Open Source blog that I wrote with Lydia Pintscher and Kevin Smith. They’re fellow admins from two other long-time GSoC participants, KDE and the XMPP Standards Foundation. Here’s a quick summary of the points; you’ll have to read the original post for details:

DO	DON’T
Be on your best behavior.	Make a bad first impression: SMS speech, extremely poor English, rudeness/hostility, etc.
Read all the documentation, so you submit a useful application.	Submit a useless application.
Be transparent about other commitments.	Disappear.
Make Google Summer of Code your top priority.	Hold another major commitment.
Be realistic about your skills.	Over- or under-rate your abilities.
Commit and publicize your code frequently.	Make last-minute (or later) code drops.
Submit code that’s ready to integrate.	Finish the summer with code that’s “almost ready” but will take forever to ship.
Complete your project design before writing a line of code.	Start coding before finalizing design.
Use your resources wisely.	Refuse to ask for help.
Remember that you’re part of a community.	Consider it a solo project, like it often is in college.