OSGeo is applying as a mentoring organization again this year and pgRouting falls under that as a guest project.
http://wiki.osgeo.org/wiki/Google_Summer_of_Code_2014_Ideas
We have mentored project for 5 or more years and these projects have given us a lot of new code. Please take a few minutes to looks at our pgRouting GSoC Ideas page @
https://github.com/pgrouting/pgrouting/wiki/GSOC-Ideas
And post your thoughts. What major new features would you like to see as part of pgRouting?
I've tried to capture the things that I think would be useful, but I can read your minds so let us know what you think.
Thanks,
-Steve