Well - just for content optimization purposes - and not yet thinking in terms of selling traffic - it would be nice to have an analytics tool like Google Analytics or other. We have just installed a plugin for the integration of these services on the WPMU sites (so that every blogger can individually decide to integrate one of a list of different services - without touching any template!). But then in the next moment I deactivated the plugin again because of my fear of the privacy laws in Germany.

I posted a request on this in German on my personal weblog. Maybe you have some insights to share with me. Thanks in advance.