There's a discussion over on the "I Got Rejected" thread:
http://news.ycombinator.com/item?id=1863374The understanding, from previous winners that have commented on that thread, is that the winners usually wait until they get the project built enough to publicize before even mentioning that they got approved.
Also... "getting in" tonight doesn't mean actual funding or being part of the project. "Getting in" tonight just means that you get to attend the interview round in Mountain View. After that, they decide whether you get funding and ability to participate.