The projects are up. The one posted here is perhaps the most successful of all of the trees.
A few notes for future iterations: the pieces hosted on YouTube are currently around 30 seconds to 1 minute. This is perhaps too short since there is sometimes considerable delay when the movies buffer over 3G. We did not have enough Wifi devices, though I don’t think this would have made too much difference.
I may try using SoundCloud as a host for a similar project. In retrospect, I think the use of QR-codes as the interface is one step too many. People are not yet generally familiar enough with them to make the interface natural.