"Conrad Riggs, a producer with Mark Burnett Productions (Survivor), did make a “small investment” in Lonelygirl15 before the series started striking brand integration deals, and LG15 studios rents office space from Riggs in Santa Monica."

http://newteevee.com/2008/02/28/mark-burnett-not-funding-lonelygirl/

See related: Thanks, VISA and Mastercard

"Greg and I want to let everyone know that not only have we never received funding from MBP, we’ve also never had the pleasure of meeting Mark."

"Fortunately, we were introduced to a new media enthusiast through a friend and he helped us weather the tough times, let us squat in his office, and enabled lonelygirl15 to continue to grow. "

http://inside.lg15.com/2008/02/28/thanks-visa-and-mastercard/

Deductively it would seem to follow that there is a high probability that the "media enthusiast" was Conrad Riggs. Right?