We’ve conquered windows. With george’s excellent post, I was able to get:
-cygwin (and subversion) installed
-open-r SDK installed
-get our code from the repository
-install the memory card reader driver
-and with editing only one file (makefile.config), get our code onto a working memory stick.

This means: check out the new makefile.config on the repository. If you want to use Win, uncomment the win part. If you want to use Mac, uncomment the make part.

The greatest thing about windows: we don’t have to script the unmounting process. It doesn’t yell at you when you take the stick out.

Windows, consider yourself 0wned.