I think I'm in the same boat with pixelguy...I plunked down my deposit last week, and while it doesn't necessarily mean I bought the car (there's plenty of paperwork that will eventually get me to that point), I'm pretty darn excited. Even if I do think there is a *chance* that my dealer won't get a car for my deposit (I've even directly asked him this question).
I almost feel like it's the few weeks between when your wife finds out she's pregnant and when you tell everyone...just to be sure. Until I have the keys in hand, I'll keep this one mum.
pixelguy, I hope it all works out. For both of us!