Rumor has it Nicks will join Petty (article)

[SpyNote]

A handful of these stations do stream online. But they often run a different broadcast over the web because of the commercials and other restrictions. I think the best thing to do is to contact your local radio station and confirm if the web stream will be the same broadcast. I added the URLs to the above stations that will be broadcasting the concert over the airwaves. Maybe some of them will be streaming it online, as well.

Otherwise, plenty of people from various message boards will be recording the show from the radio and posting the files online after the show, Stevie-Nicks.INFO included.