We also had a classroom application for Skype. I have used Skype to chat with other classrooms, but loved Skyping with the ranger at Yellowstone. The kids would love this!!! I would be anxious to see what other National Parks do this and think the 'Mystery Skype' would be fun.
I enjoyed exploring Google Plus, but found it not super user friendly. I liked the extra features like being able to chat with more than one person. I need to work on the settings because people I don't know are adding me to circles and I am getting tons of email from random people.
Overall I enjoyed this week and look forward to more classroom application!