I really appreciate your visit and interest in our company. At this point, we are unable to offer you a position, though we appreciate your talent and I will keep your contact info in my Address Book in case we need to contact you for a future project.
I wish you great success in finding your next gig!
I may or may not comment (friends only) about how I'm doing. Right now, I just wanted to update people since everyone has been so supportive.