I love Suzie Nestico's explanation of how we use Diigo for the Flat Classroom projects and her alignment with the common core writing standards. (She's a social studies teacher, by the way.) She impresses me more and more.
A study from this past January shows that 53 per cent of online Americans use Wikipedia. In order to improve the accuracy of Wikipedia and other sources like it, we need to teach students how to collaboratively edit.
I have to admit that I love Scrivener and am using it for my second book on collaborative writing in the cloud from Eye on Education. Here is the link to their new windows version. If you do script writing or book writing it is great.