Check the NY garage thread below, much of it is crossover deep house. Obvious names to check out are Mr Fingers (Larry Heard), Kerry Chandler, Chez Damier, Basic Channel (Main Street) made two of the best deep house tracks ever in Round One & Two, Ron Trent, Moodymann (Kenny Dixon jr), Derek Carter, Glenn Underground --
The prominent newish producers are probably Omar-S, Henrik Schwarz, Mike Huckaby - though most of his recent stuff is probably 'dub techno'. FHXE for Omar-S Detroit, Jus-Ed's Underground Quality, Third Ear for Detroit Beatdown... Mojuba is another good label to check, much of it minimal/dubby. Though there seems to be a lot of 'deep house' coming from the mnml scene atm, not much of which sounds very deep at all to me... Deepness being such a subjective thing after all.
Many people think being nondescript and inoffensive is the key to being deep, but I disagree. Anyway, I think the deep house was originally used to describe the more soulful, songful, spiritual Chicago house opposed to the faceless, technoid jack & acid trax- the personal vs the anonymous - but i suppose they were all played together at that time, I'm not sure when deep house became a scene of its own...