The final build that goes out as an OTA update will apparently be version 2.1, although that's not totally confirmed yet -- we're told that there are references to a "Nova-Barleywine" in the code, but it's not clear if that's another 2.x version or something else entirely.
Because yesterday in the Senate, twice during floor action, that was proposed so long as they voted on something else as well, a different version as well.