I have noticed that all this walking has toned my calves and made them more shapely (I didn't know that this was possible, as they were already pretty), and I noticed my butt as well. Definitely getting more toned, more attractive. Even my arms, which aren't getting much of anything done to them, are starting to have more muscle definition. I have more energy, and when my body thinks it hasn't gotten enough exercise, it starts pestering me by having too much energy and then I have to go do something with it.
I think that's part of my new sleeping problem -- I don't want to sleep because I'm too bouncy to do so.