Piwik is just what we need. I am starting a new service using this outstanding analytic software. I am calling it Gonalytics. SEO expert who tested it will tell you that adding GA or Webmaster tools from the big G see a fall in the search result position rank of the website in question. The access of all tracking and other data about your site to the same monopoly driven giant is not good either as it gives them too much opportunities to manipulate the rest of us.