Online applications and tools

I guess the internal office applications of something like Google.docs is fairly apparent, and would ease the production of library documents that need the collaboration of several staff, like newsletters etc. I imagine you might also be able to use Google.docs to do collaborative work with special interest groups such as local history societies, with members able to contribute to a common document which could then be put on the library's website. At one of our branches we have a collection of manuscripts and typescripts produced by a local heritage group on the history of the area which are invaluable ( I used one for a university assignment on war memorials to good effect) and it is conceivable that some sort of online collaborative document detailing the group's historic memories could be created using Google.docs.