If it has a CPU, you can run Linux on it. Xboxes or iPhones, cars or calculators, Linux can live quite happily on any of these devices. But, when it comes to the desktop or laptop, how much processing power do you need to run a modern Linux desktop? More here
DSL, which comes in a 50MB package, isn’t a one trick pony. It’s a real, live desktop Linux distribution with the Fluxbox windows manager, Firefox for Web browsing, office programs, IM client, and all the other trimmings. It’s my first choice for really old PCs.