"With the end of the school year, Apple is taking the opportunity to remind schools and educators about a free professional development program that it's offering. Called the Tune In Series, the program is a series of webcast events covering the iPad and many of the technologies that Apple introduced during its education event in January. The series is running every week through the end of August."
* Have a private chat with your closest friends
* Make a big announcement while your team or fans listen
* Hold a conference call with a select few speakers
To get started, all you need is a phone (landline, mobile, Skype, etc) and a free account with Twitter. Twalkin is an absolutely free service. Can even schedule your talks in advance-great potential for podcasts and webcasts.