Official site

• http://www.google.com/analytics

Comments:

• Has an api to get data. Python library written for the api. http://blog.clintecker.com/post/100021441/python-google-analytics-client-how-to-use-it-and-how

Start-ups using:

• Songkick, Playfire, GroupSpaces, IvyLees, Skimlinks, Poll Everywhere, Achilles, PicoCraft, Mediaroots, HotelTonight, Define My Style