I believe Inchon airport is on an actual island, like HKG. So far, they have experienced a slight sinking of the runway and there are allegations of corruptions and flimsy construction already-even before it has opened
The clever people who planned the airport thought that it would be a good idea to build the supposedly "new hub of asia" with no rail link to mainland and Seoul so for the first few years of the airport, it looks like limousine buses are the only form of transport available which won't break your bank (ie taxis)
I wish people who design and administrate the construction actually thought about what they're doing... it would make life so much easier...
Just a few thoughts...
stargold