They have a listing there of the most popular distro's.
However, for ease of use, in my opinion Mepis can not be beat. It is a Live cd, install disk, and rescue cd all in one. Mepis has a super simple installer and everything worked without any input from me. If your looking for a distro that is designed to be point and click, like windows and allows you to enjoy your computer instead of constant tweaking try Mepis.