DigitalEve, an organization for women in new media and digital technology. (Many women left Webgrrls for DE when the former started charging membership fees.)
Webgrrls, a forum for women in or interested in new media and technology
Wikichix, a wiki and mailing list for female wiki editors to discuss issues of gender bias in wikis, to promote wikis to potential female editors, and for general discussion of wikis in a friendly female-only environment.
WITI, a networking group for professional women in working in technology