I`m not too familiar with what`s out there but I know there is a lot of stuff being done in web-based video programming and broadcasting. You`ll want to do a lot of research into the competition and industry.
Contrary to what Craig suggests, I don`t recommend looking "back in history" to get a sense of how things work. The internet offers whole new ways of communicating and running a business that are much different than the old models. What worked then, doesn`t work online. Just ask the major networks in tv and radio.
Now that you have an idea for your biz, one place to start is The 10 Steps to Open for Business
. It will help guide you through what to do next.