Many of the mentors from last year will be available again this year. We are also accepting new applications to be mentors. Contact the GSOC team at gsoc(AT)tiki.org if you are interested in mentoring for 2010.
Google pays $500 per student mentored which will be disbursed back to mentors through the Tiki Software Community Association after the end of the project upon receipt of the funds, unless mentors choose to donate the amount to the Association towards community needs.
As a reference
GSOC Mentors Bio 2009