It's official! Today Wikimedia has been accepted into Google Summer of Code together with other 176 organizations:
http://www.google-melange.com/gsoc/org/google/gsoc2013/wikimedia
The next step in the process is to get the mentors registered.
https://www.mediawiki.org/wiki/Mentorship_programs/Possible_mentors
Which means that if you were still considering mentoring then yes, you still have time to join us. Hurry up! The list of project ideas is (imho) pretty impressive, and we have just started receiving more ideas from students interested in spending the Summer with us.
http://www.mediawiki.org/wiki/Mentorship_programs/Possible_projects