The released date will be announced when the Beta is underway. Doesn't make much sense announcing a date without getting enough feedback from testers first. I can only confirm a simultaneous FSX+FS9 release.
The price will slightly higher than O'Hare, but we'll try to contain the price difference under 1 EUR. JFK took a couple of months more of work compared to O'Hare, so we think it's fair the price should reflects this. But the scenery is really our best yet, and well worth the wait.
The tax rate doesn't depends from us, it depends where you live. If you live in a country that has VAT (most of Europe), VAT will be added at the rate of your country of residence, otherwise not. US user wil not pay any VAT, for example. Also, European users living in a VAT country, but in possess of a valid VAT ID (all companies), can insert that in the buying procedure, to have VAT exempted.