Cross Platform Document Management Systems?

Alan asks: "I'm looking for a way to do document management at the office. We have windows people and linux people, some writing documents that are a few lines (developer notes for example) and others are full of charts, graphs, etc. Currently we have a file server that has shares set up for the documentation, but it lacks any sort of revision control, and with the salespeople writing in Microsoft Word there are cross-platform issues. We were thinking of setting up an wiki or an everything-based site, but as it is only text, it's not good enough for everyone. There is also the matter of getting our master documentation (which is in PDF format) accessable to everyone as well, possibly in an XML format that can be imported into indesign or Pagemaker or something. There are lots of solutions that work for different departments and different systems, but it would be nice to have something that works for everyone."