Lyx HAS svn integration (Score 2, Interesting)

Since 1.6 or so, lyx has subversion integration. (File>Version Control). It is not 100% complete tough, as you have to create an svn folder yourself, and it won't update anything but the .lyx document. Yet you can commit you changes and type in a message and update your file. I'd say that you need at least one person in the team that knows svn, and set up the others