Abefroman - they're supposedly calling applicants, then mailing out letters, then about a week later, the decision will be on the web site. So, if you interviewed relatively early, and don't hear anything by the end of next week, then I would say that would be a bad sign...
Supposedly, they interviewed about 800 people, and they'll accept about 200. So, your odds are 1 in 4 - not too bad... There are maybe at least a dozen SDN'ers who interviewed there, so we would've heard something from somebody by now if most of the calls had gone out. Probably, like omores said, they sent out a few, and the rest'll come on Monday or Tuesday.
As well, they have decided on about 70% of their acceptances. That means that, probably, about 30% of the applications haven't even been looked at. Probably if you interviewed in the last month, you'll have to wait until next week. I interviewed on the last day, so odds are my application will have to wait. That is, assuming they look at the applications in order, and that they're still planning to send out 200 acceptances...
Good luck!