help improve Exchange
Paul Robichaux, one of the Exchange MVPs, has a great blog post about Exchange and the Customer Experience Improvement Program. As with many other Microsoft products, Exchange allows users to submit totally anonymous data. This data is then analysed and used to help identify areas for improvement in future versions. Paul's post details some of the data points that the Exchange team could gather. If you haven't opted in to the CEIP for Exchange, Paul's post tells you how to do that, too.
Office:Mac 2008 also has a Customer Experience Improvement Program. I wrote about it soon after the Office 2008 release over at Mac Mojo: we are watching you. If you want to opt in, you can do so in the Preferences for any Office application: go to the Feedback section and select "Yes, I want to participate".