Does the density & mass calculation affect what the surface gravity would be? If the planet is more massive than Earth, but less dense, would someone standing on the surface experience a greater weight than we do here?
I wonder whether it will be possible to build a floating city somewhere in the middle of that massive atmosphere. Air conditioning will probably take up the majority of the city's energy consumption, but hey, if you've got water, you can get oxygen, and if you've got boiling water, you can make electricity. Actually, it might be easier to live on this planet than to live on Venus (450C, all CO2).