I know that the Google Summer of Code 2010 code is here: https://code.google.com/p/google-summer-of-code-2010-dreamwidth/downloads/list for five students, and I know Dreamwidth accepted seven students but perhaps two of them didn't complete the summer.

If you're ever looking for final GSoC code for the last few years, you can search for the label "google-summer-of-code" on Google Code -- as a requirement for finishing the program, every student has to upload their finished work to a Google Code project that's named google-summer-of-code-YEAR-ORGNAME.