I understand that would be duplicating work, but there is no decent port of the GLMatrix XScreensaver to Windows. This would be awesome to have.
Sorry, I'm not sure if it would be very feasible to combine them, as the designs are quite different. It might be a better idea to port xscreensaver itself to windows, then all of the modules will work without modification. I don't use Windows, so I'm not sure if someone has already done this. I don't think jwz uses Windows either, so if it hasn't already been done, you might have to start the port yourself!
Thanks for your comments, and good luck finding something :).