“HUDDLE, based in London, offers the standard set of features that one sees in online project management software, such as task lists for groups, ways of assigning responsibilities to people, etc.
“It is most interesting because it is both a free-standing site and a Facebook application. The latter shows you a task list, where you can see the people in Facebook that you’re working with, as well as links to documents that you’re working on together, such as Word or Excel documents. (See Venturebeat’s original coverage here.)”