I have come to the conclusion that the business models used to justify talk radio on the web are not going to work. The amount of work required to run a 5000 watt radio station is about the same as the amount of work required to run a 50,000 watt radio station. However, a 50 KW radio station will cover 10 times the area and presumably will have 10 times the number of people. The internet and specifically TCP/IP, the amount of work increases in proportion to the number of listeners. It is not practical to think of, say 1,000 people listening to an internet broadcast. Yet there are radio broadcasts which would go broke with only 1,000 listeners.
"Talk internet" will work with organizations who want to get a message out and are interested in reaching people all over the planet. But it probably won't be popular with traditional large advertisers. The problem with the internet as an advertising medium is that too much control is in the hands of the individual users (that's also a problem for people who worry about computer security). I am not too concerned about my friend, Laura Lee. She is an extremely able marketeer, and I predict she will either find her niche or else make a niche for herself.