Similar story here. I've been almost constantly looking for them since I got my job and started carpooling in late 2012. Not a day goes by where I don't try to identify every car I see on the 50 mile round trip commute. I even have a spreadsheet where I keep track of the when, where, and what (color, plate, etc.). Excluding the four I saw at the last two Detroit auto shows, I've spotted five in the wild, though all of them only for a few seconds. Fortunately, I have blurry dash cam footage of 3 of them to prove that they exist in Michigan. It blew my mind when the first two I saw were on back-to-back days, June 4th and 5th of 2013, and the first still remains the best.
I've told my family, my team of four at work, a few friends, the loan guy at my credit union, and the Internet (G+ and Tesla forums/IRC). The only person I haven't directly told who asked me about it was a co-worker who noticed my G+ post. Other than that, it doesn't seem to spread nearly as much as in your case, despite being in an open room of dozens of developers.
"When are you getting it?" is by far the most common question. My dashboard says late June, which is usually what I've been telling people, but sometimes I'll say late June/early July because I might want to schedule delivery for July 3rd (my birthday) and take advantage of the holiday for an extra day off.
I confirmed on 4/22 and haven't received my VIN or even a phone call yet. Hopefully soon...