Linux here, too. I need some Windows software (Mathcad), so I'm running XP/Cygwin here at the office. So UNIX everywhere, Linux at home (and of course, on the N800).

You'll pick up the stuff you need to get done what you do. If you do have enthusiasm, of course you'll learn more. And with an open system, there's a lot more to gain by that than with Windows. But in both cases, just using it will teach you to the level you use it.

Great link, Dick, I didn't know that was on-line... have the print edition.