Performancing.com has metrics for your blog

If you’ve wanted something like Google Analytics, but haven’t been able to get more information about it and didn’t sign up in the first wave, then you’re not out of luck yet!
Performancing, has written a pretty good metrics system that you can add into your blog(s). This way, you can track referrers, Adsense, and all sorts of other metrics.
Just go to Performancing, sign up for a free account, add the parts into your blog and watch how you can optimize that cash flow.