What Rydian said. But basically, DSLinux is proof that a low powered hardware can run a fully functional version of linux with basic multi-tasking, media playback, web browsing and other stuff you would require a PC to do.
right now it's as much as ten times faster than other browsers (such as Bunjaloo or the on-board one in DSOrganize), however you gotta already know a thing or three about linux to use it apparently. I.E. it's not noob friendly.
I'm considering trying it again once I get a slot-2 device, as apparently that greatly improves functionality.
But when that time comes I'm gonna need a "dumbed-down from the wiki" how-to.
The DSLinux wiki should be easy enough to understand for anybody to get the hang of it. I still use DSLinux for its multitasking capabilities, so that I can browse the web and chat on IRC at the same time, for instance. You just have to get used to the idea of everything being called from the command line. Also take advantage of tab-completion with filenames, as that helps out quite a bit.