Depends on what you want to do with it. If "very little" describes your computing needs, you are good to go.
Well, gee, let's see: I run a PPC405 cross compiler toolchain on it, an X server, SSH and Subversion, use it for email, use Firefox to browse, and run iTunes and Photoshop. I would say you are talking out of ignorance. Perhaps Microsoft Solitaire is the most complicated app you run?