I have embedded a couple of things that I would share with my classes. The first is a performance of the YouTube Symphony. This is a group of musicians assembled from around the world who auditioned for this orchestra via YouTube postings.
The second is a speech by Benjamin Zander, conductor and motivational artist.
Copyrights can be a tricky thing, so I was pretty surprised when I found myself actually drawn to the music video like the ones I used to watch on Saturday mornings when I was a kid (Conjunction Junction, etc.). One thing that is new to me is that adding value to materials is probably classified as fair use. Nice!
Dropbox could be a cool tool for Orchestra. When we have playing tests - students record the music on their computers and then submit it to us electronically. We could create a Dropbox for Orchestra where they could just drop in their files and we can listen to them.