Indeed. My local shop is selling their last one (a display model) for that price. To me, the advancements the X100S offers makes it seem foolish to not pay the extra $300 for the upgraded model if you are buying new, but if the price were say $800 I may very well reconsider that position.
I agree... the few improvements that the X100s offers over the X100 are disproportionately important to the shooting experience - particularly with this type of camera. That means a bigger discount is warranted on the outgoing camera. Certainly by the time the X100s actually hits the shelves and is readily available, I can't see the X100 selling for more than $700-750 U.S.
$800 including a case is very good value (although I guess some tax has to be added on to that). That's about the price you pay including tax but - without a case - in the UK.
I'm tempted by a 6-month old used example going for £399.