I used Knoppix for a while when my comp crapped out on me. I used it to save all the important files i needed before reformatting the HD and re-installing XP.
I would love to go full *nix, but my mom don't like the layout/functionality. Plus, she's a teacher, so a lot of the programs/documents she needs are in windoze formats.
I'm just glad i had Knoppix on a disc before my comp crashed. My friend told me to download it just a few days earlier.