Here is a little update to my last post. I quickly whipped up a web app for the little stats script I wrote.
It is available at http://osm.linfiniti.com. The stats only update once per hour so as not to hammer the osm export server. The code is all open source (https://github.com/timlinux/osm-reporter), written in python and Flask. I don't really have time to work on it more right now but hopefully others will pick up on it and improve it. Here are some todo items:
Hopefully someone will give me some nice patches :-)