Recently Ubuntu celebrated it's five-year anniversary. Ubuntu 9.10 "Karmic Koala" marks five years since the initial release, 4.10 "Warty Warthog". This article by Christer Edwards outlines some of the things Ubuntu has brought to the Linux world, and what a major impact it has had in such a short amount of time. He has been using Ubuntu nearly that entire time, having joined the fun with the 5.04 release.