I found a great workout for pretty cheap money. My wife just had our second child. They are only 1 year apart, almost exactly, so she's basically been pregnant for two years. We bought this program and she's been doing it about 4 times a week. In just 3 months her abs look better then they ever have.
It's not crazy dieting or rediculous cardio either. Here's a link: www.Probody360.com