The service introduced by Skype today could very well shift the dynamics of podcasting a little. I am going to run a test later today, and see how well it works with a group of people, You are limited to having a live session with 100 people but this will be perfect for a lot of events, group discussion, and meetings that happen on the net.

The only limit I see at this moment is not being able to make the skypecast private, thus having a private online meeting using this service is not possible yet. But you could use it to broadcast your podcast live. [skypecasts.skype.com]