Students could use Jing to take a picture of something they are working on and share it with other students or their teacher. Teachers could use Jing to create a training video for students, showing them how to access their san folder or how to notate a song in music software. I have a project with kindergarten and 3rd grade where I record the students singing a simple song and then I save it to their personal folder on the network. I usually use class time to show them how to access it and listen to it, but I could make a training video that they could view during their computer or library time.
Skype could be used to share performances with other schools. While I always believe that performing for a live audience is the best option, Skype would offer opportunities for teachers to perform for one another and their classes. If the schedule or budget does not permit students to have live performances then teachers could set up a performance and broadcast it to another school in the district.
I have been using Skype for personal calls for about a year now. I am able to talk with friends in other states and see my nieces and nephews who live in Michigan. I really enjoy using Skype because it seems like the other person is in the room with you.