I was in the BB store in Dubai earlier today, and according to the staff there the Passport will not only be launched on 24th September, it will also be released for sale on that date. Price unconfirmed, but apparently less than 3,000 AED.
Also, the staff in the store stated that 10.3 will be released for all BB10 devices on the 24th September.
Let's hope their information is accurate.