The Twit podcast network, long a source for tech news, has announced that it will no longer provide live broadcasts (including chatter from the studio) and do away with the chat that accompanied the live programming. The chats were a popular feature of the programming and used by the on-air talent to obtain information used to answer questions.
The reason for the changes are a bit unclear (to me). Leo Laporte mentioned the chats were having trouble with trolls during a recent MacBreak Weekly.
I find these changes unfortunate as participatory programming is unique and the network is now really offers television online. This will have a different feel.