Collaborating with non-pandoc peers

[Joseph Reagle <joseph.2011-T1oY19WcHSwdnm+yROfE0A@public.gmane.org>]

This isn't really pandoc related specifically, but I am curious about other users.

I write *everything* in markdown and use pandoc to make slides, articles, books, and blogs.

None of my peers are up to collaborating in markdown using, say, git.
One option would be to copy my markdown into a Doc.
(Note: I'm not creating a Doc from markdown because I don't know if this would round trip.)
Say I want feedback from Theresa, I create a branch "theresa," copy the files into Word files, she edits the docs, I copy her modified text into her branch when she's done and merge.
This will be weird for Theresa because there won't be any formatting, although I do have a macro that formats heading and italics and such based on markdown regexes.
But if we want to use Google Docs, that wouldn't work.
In any case, this is annoying for me because I have to manually port text blocks.

How do other people manage this?