Guys, do you think it's okay to use my somewhat-ancient computer to mine for Bitcoins? It's got hardware that was great a few years ago, and an Nvidia graphics card... Might it work?
Not in a long shot. First of, don't use nVidia but ATI(AMD) graphic cards. You will pay more for the electricity (depending where you live, it's almost true for any country) than you will earn bitcoins.