Advice?

I am currently at 138 down from 179 at the birth of my son. I've been doing Zumba on the wii (not for long about a week and a half) and I've worked up from 20mins to 40mins to about an hour as of yesterday. I love the Zumba!

BUT.

I am not sure I am hitting my problem areas. Yes I want to loose weight. But more importantly I want to see the changes in my body instead of the number going down on the scale.

My biggest problem areas are my legs and butt.. I have a 30 inch waist that i am fine with but I would like to slim down my legs and butt and arms.

What are the best ways/ exercises to do to accomplish that... My legs are fairly bigger for a female it seems ever since I built a lot of muscle playing soccor in high school