I recently (2 months ago) dropped out to join Pinterest full-time, and I am extremely happy with my decision.

I was in a similar situation as you, except the opportunity came to me as a sophomore, instead of a freshmen. Let me preface by stating that I think college is an extremely invaluable resource to grow up and learn outside of the classroom. I did, and love it.

If I were you, assuming you do get an offer, I'd register it as a co-op with your college. I did that last year with Lift (http://lift.do), and think it was the best way to go about the situation. Here's why: it's still a full-time job, you're still technically a student, and you don't pay any tuition. If you like it, great — stay out there. If not, no harm-no foul, and go back to school.

Happy to chat over email with you, if you'd like. Look in my profile for contact info. Good luck!