I was at Santana Row on Sat. 11/26/2011 because there was a beta there. Brought my wife and reservation confirm hoping to get a chance to sit in the front seats, since our factory experience was in the back seat.
One of the Tesla reps told me it is VIN number 20 - an engineering Beta prototype, and engineering said nobody could sit in it. I guess they just borrowed it for the holiday weekend. He also mentioned it is one of the first Beta's "mostly assembled at the factory". Anyway, I was happy they've already built at least 20 beta vehicles.
If anyone sees a Beta in the wild on tour with a VIN number higher than 20, please post it here. We can start tracking highest Beta VIN like michicanmodels tracks reservations.
PS. I mentioned the threads pointing out the lack of a large center console between the front seats. Rep. said he noticed them online, too, but store visitors who see the "S" never raise the issue. I guess the gawkers aren't as obsessed over every detail like us!