One nice thing that Radio provided me with was very basic site stats. I could easily tell how many people were viewing my home page. It didn't give much beyond that and referers, but it was enough for my needs.

I thought about writing my own, but in the end I found MnM Stats. It's just on version 1.0, but it isn't too bad and does the basics for me. It requires PHP and MySQL, which also works just fine for me. Of course now I want to be able to get even more complete stats for my site. If you're curious about traffic here you can look here