Working moms in law, financial services and business know the tough path to career success in these male-dominated fields. In some work environments, you don't even want people to know you have kids, for fear of being shunted to a low-advancement mommy track.
Check out the Glass Hammer, the latest About Working Moms Site of the Week. The site is devoted to women executives and is chock-full of smart blog entries, job listings and events. Read about the "kid ceiling" and some of the appalling comments working moms have contended with or the debate over femininity at work. There's a robust community section for connecting with other women in your field.
I also must say that I love the name of the site. Maybe if we all hammer away at the glass ceiling, we'll manage to crack it without breaking our heads first.