I was recently given a test drive of the forth coming Overstat web analytics (OS for short) and user tracking package; in a phrase I'm impressed. It is not trying to replace Google Analytics, Webtrends or Omniture but rather augment the visitor information in a visual format the leaders miss. What I mean is that Overstat provides a visual representation of how visitors are actually using your site. You can (and should) continue to use GA to track your Ad Word campaigns, but use OS to get a real feel for how users are moving througout your site.
What pages they move to, where on the page they click, what pages they exit from....and all of this is displayed directly over the actual web pages. This differs from the standard stats packages that simply offer Spreadsheet style lists of the top pages, top links, etc. Designers rejoice at finally being able to determine where on a page people are clicking (links or not) and what Click Paths are the most successful. Usage trends that were hard to extract from lists are crystal clear when presented with thumbnails and overlays.
All of the regular statistics features are also included, but have been given a face lift with the help of Adobe Flash and Flex.
Listen up folks (and you heard it first here)....this is going to be a game changer for Web Analytics and User Tracking. Last I checked, they were still accepting Beta Registrants for free.
http://www.overstat.com/