MamaNeedsABookContract is fabulous!
Great idea to spread it around with other authors. Provides more than one viewpoint and helps each other get more exposure at the same time.
I noticed that your JCPenney ad is inside of a BlogHer widget. Does that mean BlogHer makes the money instead of you ladies who post on the blog?
According to http://www.websiteoutlook.com
you've got daily page views of 615, page rank of 3, and 510 back links. That's definitely enough traffic for you and your friends to be earning more money with this site for work that you're already doing.