Are you a budding Web entrepreneur who would like some pointers or advice from seasoned company founders? MayField Fund and First Round Capital are sponsoring a raffle to give away mentoring sessions with the founders of Digg ( Jay Adelson ), Flickr ( Caterina Fake ), Mint ( Aaron Patzer ), Ning (G ina Bianchini ), Slide ( Max Levchin ), and Zynga ( Mark Pincus ). The raffle will take place at a private event in Silicon Valley with space for 100 attendees on March 1