Similar to Mystery Skype, Mystery Location Calls connect classrooms.
Developed by Paula Naugle, a fourth grade teacher in a suburb of New Orleans, Louisiana.
Learn more about connecting students through Google Hangouts in Jerry Blumengarten & friends new book:
Connecting Your Students with the World:
Tools and Projects to Make Global Collaboration
Come Alive, K-8
Bring the world into your classroom through G+.
*Not a very active site but scroll down to the bottom to "Meet The Tour Guides". Use these companies to help connect your classroom with experts.
Google For Education
Education On Air Conference May 8 & 9, 2015.