C O B,
For info the 380 needs a 60m wide runway, and any airport that can handle a A346 or B773 is of the right size for the 380 to taxi around. If the wings don't fit at the gate, stairs can be used on lower doors to board etc at a remote stand.
The quote of .86 in the cruise is on the money.
I have spent a bit of time (on behalf of my employer) looking at the VVIP config of this one. No restrictions to any of the airfields we fly to now in a B744. In fact they reckon because of the extra wheels it is kinder to the runways taxiways etc.
Our discussions with Boeing about the 748 are also ongoing. There is a problem at the moment that to carry the weight of the required fit we need, and the range we require, the CofG becomes very restrictive. This I think, will also be of some interest to PAX fleet operators, but I am sure in time it will be fixed.