Desktop Widget (brandable)

I work for several schools, and would like to create a desktop widget that I can brand for each school's use. The widget would have the ability to push information out to user, including text, podcast, video. Depending on the user's needs, one user may receive a different feed than another. You can see a similar product at [login to view URL] Please send questions if you have need more details. Must be MAC and PC comptaible