Google Analytics
I have been using Google Analytics since it was in Alpha/Beta and I have to say it is a really awesome FREE web analytics tool. I just wish they would give you some sort of RSS option so that I can get "reporting" via my reader. I'm really not into that whole going to many places to get my information... ;-) - I prefer the one stop shop/view feature that readers afford.
I have also been using Google Apps for your Domain but since I get my domain's POP email through Gmail (you don't have to change your domain MX records) I really don't need it - since it is just my wife and I that use email on my domain.
