SLAX
http://slax.linux-live.org
Slax is a very light, slackware-based livecd. If you have a lot of ram, be sure to boot up with copy2ram in order to get a full speed distro. It is a pretty, KDE-oriented release that is light enought to be burnt on a minicd and full enough to offer an app for most any need. Worth a look at any rate, and a relatively small download.
PCLinuxOS
http://www.pclinuxonline.com/pclos
Although I have never tried PCLinuxOS, it is based on Mandriva. Mandriva is a very nice distro for new users, and is especially oriented towards the home desktop user. I have heard good links about this Mandriva derivative, and it is supposed to be a very well-integrated distro.
see http://www.tuxmachines.org/node/1345 for some more information



