Bookieboo.com, a free social networking site and online magazine for healthy fitness moms was created by Leah Segedie, who has been steadily losing weight since her son was born in February of 2006. Cutting out preservatives and finding the balance between motherhood, exercise, and motivation was her secret. Her weight loss inspired her to create Bookieboo to help other moms trying to lose weight.
I really like the interactive, social component of this site. You can go and blog about your experience and read the blogs of various experts and mothers sharing their own tips and struggles.