concurrent word document collaboration

My colleagues and I are working on a large specification, in Microsoft Word

For the first few weeks, we all worked on separate pieces, and collated these together to form a single specification.

Now, we need to incorporate review comments.

How would you approach concurrent edits to a word document?

Note: We do have SVN, and I could in theory set the needs-lock flag on the file to prevent wasted effort working on a file that can't be merged automatically

CodoxWord is a true real-time and full-featured collaborative word processor that allows users to do real-time collaborative work in Microsoft Word.

I would suggest trying Google Docs for the editing process, and put it in Word once it's ready to be formatted.

In addition to Google Docs you could try Writeboard from 37 Signals. Like Google Docs it will track revisions and you can password protect your document. It also looks to be free.

It's a bit convoluted.

1. Make a SVN repo and store the doc outside of it.
2. Create a script that:
   1. Unzips (yes, unzips) the DocX file into the repo.
   2. Pushes changes to the server.
3. Create a script that:
   1. Pulls changes from the server.
   2. Rezips the directory.
   3. Replaces the DocX.