Seems to be some minor mix-up here, cosinaphile.  Correct should be: The Fuji X10 sensor (2/3"): w:8.8mm - h:6.6mm - area: 58.1mm2 ['çrop factor'=3.93)
                                                                                                           In comparison:       (1/1.8"): w:7.18mm - h: 5.32mm - area: 38.2mm   (= 52.1% greater areal).

Your point that this is a significant larger sensor compared to what many (of the high end) P&S cameras are equipped with, is, however, to the point.  My price guess: US$ 499.00.
For sure looks to be a nice travel companion for anyone serious about photography.  The 'form and design factor' is ten out of ten as far as I'm concerned.