A few days I introduced another new group photo sharing site called Flicsy. Zang Zing is another new site in beta which has a goal to make it easy for groups to share photos. Users can create group albums and add photos from the popular photo sharing sites including Facebook, Picasa, Flickr and others. From what I can tell, this is a key difference between this and Flicsy which appears to be limited to sharing using Facebook. Privacy settings can also be controlled to determine who can see your photos.
Much like Flicsy, Zang Zing could help make it easier for teachers and students to share photos from multiple sources and put them all together into one album.