You mean server side? Someone producing report from webserver log files or web analytics is fine?
For web stats I used just google analytics. A good free tool. The downside of Google Analytics is that:
1- You need a JS enbled browser to work
2- You don’t own the data. You can’t take it with you.
I think the best analytics out there is http://www.omniture.com/en/ but they are unfordable as they target big companies.