Forwarding the following message from Direct2Dell's user comment: One way to monitor relative popularity of Linux distros is to use Google Trends. Here is a graph showing the frequency of Google searches for Ubuntu, Fedora, and Suse. You can easily see that Ubuntu is dominating the Linux market and growing fast!
http://www.google.com/trends?q=ubuntu%2C+fedora%2C+suse or http://www.google.com/trends?q=suse%2C+ubuntu%2C+fedora
