I came across Nota today on the iLearn Technology Blog. After reading the description of it, I had to have a play. Especially since we have been looking for alternatives for wiki and site home pages.
Nota is an easy to use collaborative work space which is Glog like and more.
With Nota it is easy to import pictures from your various online accounts, including Flickr and Picasa, as well as add message boards, links, shapes and text. It is quite simple to figure out, and can also be accessed through PhotoPeach accounts. If you don't have a PhotoPeach account there is also an option for creating one on the the Nota site.
Notas embed easily into Google Sites and Wikispaces so the potential for interactive walls (Invite participants) as well as home pages is definitely there.