Today, the Memphis Convention & Visitors Bureau and Goodman Media have issued an updated press release indicating that a live satellite feed from Sun Studio will indeed be available for radio sations to have access to for the "Global Moment in Time" on July 5th.
At Sun Studio the recording will be played and sent out via satellite. The legendary Scotty Moore, lead guitarist on that recording, will be the one to "press play" for this historic occasion.
Any radio stations that cannot access the live feed are still encouraged to join in by playing the record at 12:00 noon ET on July 5th. So mail your local station with this information.