Hi,
Jack Unrue's very promising Windows backend is now available in McCLIM CVS, under the name clim-graphic-forms.
The backend is largely dysfunctional at this point, but after convincing myself that I would be able to understand it if necessary, I decided to get things going and commit it anyway.
With my changes, the address book reacts to mouse and keyboard input a little. It still does not draw itself properly, and I believe that anyone starting to hack clim-graphic-forms should probably start looking at that first. (Demodemo does not work either, so that would be worth fixing, too.)
You can find graphic-forms support for clbuild in my tree at http://www.lichteblau.com/blubba/clbuild
David