Comment System Administrators Guild (SAGE) (Score 1) 112
SAGE is a professional organization for system administrators; you can find more at http://www.usenix.org/
Reasonable rates for individuals, and even better if you can get your current employer to pay for it.
The yearly conferences (USENIX, LISA) are great, and there are many Linux supporters (and detractors) present. Great if you can go; I missed it this year.
Other than that? Read O'Reilly books, read man pages for fun and, when you need to, visit the Scary Devil Monastery.
