I love google analytics. If you blog, you really need to play with this. It tells you fun stuff like, 53 people visited my blog yesterday, 61% for the first time. It has a neat map so you can tell, generally, where in the world they came from. And, if you found my blog via google, it will tell me what you searched for. Thats how I know that somebody, yesterday, searched for:
porridge microwave lumpy gooey mess
and my blog was the first thing on the list.
I love google analytics.