final revisions are now in the pipeline and being tested by T-Mobile and RIM. these are production-ready final revisions (meaning that, unless there's a major bug, these will be it). they are still on schedule for an early to mid september release.
i put a bit more info in this thread: 7100 series:What would you change?
i'm not sure if Cingular will be picking it up, but i honestly don't see why they wouldn't... considering all of the 'fixes' they have done to the casing and whatnot, i think it'd be prosumer market suicide if the other carriers did not jump on the bandwagon with the updated handheld revision.