Oh my - a Google Phone Interview

I have a phone interview scheduled with Google in two days time. I'm a *tad* stressed out. As in I don't think I'll sleep very well until it's over. I've Google'd (heh) for information on how Google conducts interviews and so far it sounds like it'll be tough. I have a bad feeling the interview will focus on:

1. CS concepts and algorithms that I studied in school but never had to apply in real life;
2. Brain teasers (I'm not very good at those);
3. Um, other hard stuff :)

Scary.