Motivational podcasts

Options
Hey everyone.
I'm a bus commuter and so I have anywhere between 1 to 2 hours a day where I have my ear buds in and either just sitting or mindless walking to do so I listen to podcasts. I have found a series that I've been finding really helpful and wanted to share them.

I have an iPhone so I use iTunes, not sure if these are available to others or not..
You can find them here: http://www.quickanddirtytips.com/
I love the Nutrition Diva and the Get-Fit guy as well as the Mighty Mommy and Make it Green Girl. (Other favorites, Manic Mommies, SModcast and You look nice today. In case anyone worried I was affiliated or bias:)

What are your favorites? Or other motivational media's keep you interested?