Sree Sreenivasan podcast of Twitter for journalists online discussion

For those who don't know about him, Sree Sreenivasan teaches at the Columbia School of Journalism and is highly regarded as someone who gets how to use technology well in the pursuit of journalism. He does occasional webcasts now - I just got an email about one on LinkedIn for journalists today at 3:30 to 4:30 pm Eastern (at the link and available afterward). But right now I'm listening to the archived version of the webcast on Twitter for journalists. It's got an interesting set of speakers, and it's free. One reason to catch the webcasts as they happen, though, is that you can dial in (instead of coming in over the web) and ask questions. In today's economy, who can't use a good deal?