You can download the src each night as it changes in development Maffe. =)
Files included are, babl-0.1.3.tar.bz2, gegl-0.1.3.tar.bz2, and Gimp-2.7.2.tar/bz2
All the necessary tarballs to build it.
Each one of these are updated constantly.In fact gegl and babl just changed from -0.1.2 to -0.1.3.
Download link..and instructions to build from git are herehttp://www.chromecode.com/2009/10/night ... uilds.html
You should be more or less able to do it with wget for windows also using msys.
I am however learning there are so many dependencies, it's unreal.When i do get it working, and i will.
The zip folder with all the dependencies and build shell script will be made available for download with the GPL.