I'll keep it short: awesome band, you should definitely check them out if you haven't yet. At the same time Richard James was breaking out with his crazy ambient techno, these guys were actually putting together some insane shit and keeping it hidden under the eyes of the press. They eventually released that stuff into these:
Amorphous Androgynous - Tales of Ephidrina 
Future Sound of London - Dead Cities
Now, to be completely honest, when I hear the genre "ambient techno", these are who I think of. Truly brilliant stuff: