Other Umpire Sites
Women Softball and Baseball Umpires USA is an awesome Facebook group with interesting discussion boards.
The Amateur Baseball Umpires' Association's site includes clinic information, discussion forums, links, and so on.
Umpnews.com is a simple listing of all umpire-related articles on the web and over the wire.
There's a soft and community-minded side to the guys you see working big league games! BLUE for Kids, founded and operated by major league umpires, is a non-profit for at-risk youth and kids coping with serious illnesses.
Umpire-Empire is a newer online community for umpires, featuring articles, product reviews, forums, and live chat.

Women in Athletics
The Women's Sports Foundation, founded by Billie Jean King, has a site devoted a broad spectrum of information and issues regarding women and sport.
The National Association for Girls & Women in Sport champions equal funding, quality and respect for girls' and womens' sports. Their webpage includes information about their interest areas, programs and events, and professional development (especially for women interested in coaching as a vocation or avocation).

Articles
In February 2008, Ria Cortesio was interviewed by the Hall of Fame's Education Department, and she gave a shout-out to Women Umpiring Baseball!
Click here to find out more about the crew that umpired the 2008 New York Mets v. Michigan State exhibition game.
Ila Valcarcel of the Florida Umpires Association is highlighted in this article.
Perry Barber speaks her mind at Slate's XX.

Other Links
MLB's Commissioner's Initiative on Women and Baseball. MLB values women!