Lightweight Linux is a blog about using Linux on old computers. Lightweight distributions and applications bring your old hardware back to life!
Elsewhere: Top 5 Tiny Distros
Just found an interesting article: Top 5 Tiny Distros by srlinuxx (05/03/2008 ). It is a short review of CDLinux, SliTaz, Damn Small Linux, Austrumi, and Puppy. The author considers Puppy and CDLinux as winners.