I've been a fan of SimplyMEPIS for years. The distribution was one of the early pioneers in the field of user-friendly Linux development, and to this day offers a system that usually "just works." Earlier this month the MEPIS site announced a community variation for older computers based on SimplyMEPIS. AntiX is an installable live CD that features a modern kernel, recent X server, and lighter applications for use on computers with as little as 64MB RAM. I tried it, and liked what I found.