Regarding ambient dub stuff:
Original Rockers
Dread Zone (somewhat)
all three Beyond compilations
Another Fine Day (also on Beyond)
Below 110 compilation from New Electronica
Banco De Gaia
Higher Intelligence Agency's Colourform
The Orb stuff (of course)
Also, I find Pete Namlook's live recording here in San Francisco from
last year to be some what dubby (Namlook IV), and then some Saint Ettiene
instrumental tracks to be dubby (especially the mixes by Original Rockers).
Mohsen