I have been a Linux user since 1993, using it full time as my primary desktop since 1994. In that time I have used several distrobutions, ranging from Slackware, RedHat, Gentoo, CentOS, and Ubuntu. Currently I run Ubuntu on all my desktop machines, including my Laptop, home desktop, and my office desktop. For servers, I now stick to using CentOS, except for this server which currently runs Gentoo.
I am currently working on some documentation that I plan to contribute to Ubuntu and CentOS, time permitting of course. For now, here are a few Linux resources that I have created. Once I get a chance I will put some other useful things here soon.