Which is why I'm linking to a Second Person Shooter blog post by Laura Michet explaining her own reluctance to address the topic while tentatively wading in.
Hey, want to see something cool? BLDGBLOG takes a look at an architecture student's thesis designing a floating city over a flooded London in 2030. This is a space I want to explore in a video game. Hydrophobia and Brink are both located within in flooded worlds but being set in a (bombed) luxury cruiser and (trashed) posh city make them--from what I've seen so far--far more familiar than Anthony Lau's lovely London.