This seems like a particularly unappealing deal. In exchange for 5-10% of your company, you get no office space and barely enough money to survive a hot Atlanta summer ($6K per participant). According to the FAQ, you're supposed to make the money stretch for six months.
That better be some triple-distilled, A++++ quality mentoring.
If I had to try my own hand at mentoring, I would say: don't be a sucker.
(you can mail me a 2% 'thank you' stake in your startup at your convenience)
[edit: fixed wrong percentage in original comment]