Well, I did. A few years ago, my mom was having a bunch of trouble with xp on her netbook, especially connecting to my house wifi. Did a dual boot install of Ubuntu 10.04 on it, and once I installed the flash/mp3 packages, had absolutely no issues with it. She's been using it since, updating when it tells her to, with no major issues. Now granted, this was a travel machine, so it was mostly limited to internety stuff, and the odd game of soduku, but its been a perfectly reasonable choice for her for a few years now.