Free Software Magazine has examined why (K)Ubuntu is so popular and written a short article about it.
Read it here
With all its features, versions and usability, Ubuntu might just be a fad worth checking out. Each of these Ubuntu-based systems installers fit on a single 700MB CD and will install on almost any computer. Downloads for the CDs images are available on the website for the distro you want.
Ubuntu and its variants can also be downloaded as live CDs that you can try before you install, so theres no excuse not to try out the next new Linux fad!