From Tesla's SEC 10-Q Quarterly Statement, posted today <http://www.sec.gov/Archives/edgar/data/1318605/000119312514403635/d812482d10q.htm>: It's been done for over a month and we still don't have any spy shots! I expect that it hasn't left the factory or design center. Hopefully we'll get to see the Beta cars soon!
From the previous shareholder letter (7/31/14): So they probably completed the first alphas three months ago.
There's a difficulty for car spy photographers with EVs: you can do a lot of testing indoors. But it's gotta come out to play someday.....