Oprah and Apple have announced that her series of Podcasts is available through iTunes :
“With such video and audio podcasts as Oprah.com’s Health and Wellness Channel, Oprah.com’s Spirt Channel, and Oprah.com’s Money Channel, you can now enjoy some of your favorite Oprah programming whenever you’d like. Download and watch individual podcasts. Or subscribe to a channel and have iTunes automatically download each new episode for you. Enjoy.”
Oprah is offering both audio and video Podcasts.