<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Airbus do indeed envisage...F and C on the upper deck and Y on the lower...the rationale behind the A380 double deck...was to segregate the premium class boarding from the masses.
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I could be wrong, but it would appear at the moment that the comments above were born between two cheeks in a burst of hot gas.
In a simple attempt to avoid repeating this mistake, I took all of 30 seconds to look up the following information as it stands of now. Please take a look for yourself if interested...
http://www.airbus.com/product/a380_cabin_layouts.asp
http://www.airliners.net/info/stats.main?id=29
The cabin floorplans clearly show F and Y on the lower deck and C & Y on the upper deck for a standard three-class configuration. Other configurations could allow for ~ 800 seats in a Y-only plan as well.
According to Airbus' little blurb about optional executive areas, they too would appear on the lower deck. It's pasted here...
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">The A380’s twin-aisle twin deck passenger cabin offers the long distance traveller a whole new level of comfort. A cabin designed around a large sample of today’s real passengers providing more space regardless of class of ticket, wider seats and aisles. Optional lower deck use for rest areas, business, bar or other amenities can further enhance the A380 travel experience.</font>
You can get far more technical information from a variety of sources if you just bother to look. Too bad Airbus isn't in the
segregation business. Thanks for letting us know where you stand on the issue though.