Brilliant idea ! Stowe Boyd has started BlogTalkRadio - here's the blurb:
BlogTalkRadio is a platform that extends the blog, allowing any individual to host a live blogshow online. Our service is free to all users, whether you host a blogshow or listen in. Plus hosts earn half of all revenue generated by their blogshow and Host Channel page.
The blog has changed the face of media and communication. But unfortunately, it has its limits. Primarily, the blog does not allow for real-time interaction between the blogger and his or her readers. At BlogTalkRadio, we extend the blog to allow such live interaction, as well as allow users to generate and consume content in audio format as well as in written format.
We allow every individual the freedom to become a blogshow host, similar to a radio talk show host. That is why "radio" appears in our name. However, because we are on the Internet, your potential reach as a blogshow host far exceeds the reach of a radio talk show host because your audience is global rather than regional. Additionally, as a listener, you have access to far more content than you would on your local or even satellite radio station.
Any individual, anywhere, as long as you have an Internet connection, any kind of phone, and something to say! We welcome hosts who have passions and interests they want to share, opinions and information they wish to disseminate. Whether your audience is 10 or 10,000 people, we have a place for you here at BlogTalkRadio, and we'll even help teach you how to expand that audience.
thanks to Euan for the info :)