I've also wondered if Burt had known it would take 4-5 years to get to SS2 if he would have built a second or third SS1 to fly during the interim: Virgin Galactic's SpaceShipOne-point-five: a future that could have been - Hyperbola . He has mentioned that he had requests, I believe in one case from DARPA, to fly engineering/science payloads on the SS1.
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A testing update from Paul Breed: A Glimpse of scary little details... - Unreasonable Rocket
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Items about a couple of the Google Lunar X PRIZE competitors: FredNet Makes Maker Faire; LunaTrex Post - Space Prizes ...