I do a lot. Kind of a jack of all trades, at work, people come to me for a wide variety of things. Since a lot of our clientele are windows based firms; a lot of my requests are to write a POSH script or help debug an issue with exchange. However, many of our clients do have other servers running *nix and my colleagues usually come to me to troubleshoot them as well.

At home, I spend a lot of my time brushing up on my python, javascript, PHP, and ruby skills. At the moment I'm working on a developing my own app and hosting it off of Google App Engine with some moderate success and a lot of failure.