The personal computer is political. The time for liberation has kind of come. So what happens when you load up that new, quasi-user-friendly Linux flavor -- maybe Mint or Ubuntu -- onto some old machine you have lying around? At first, maybe, keep the Internet handy on your shiny Mac, because there might be glitches to look up. But chances are it'll mostly work out of the box, and the rest can be figured out over time. Everything's harder, but in a good way -- like a digital fixie. It's more fun if you do it with a friend.