How many moons might be habitable?
At least using our own solar system as an example, it seems a good bet that planets of such size have some significant sized moons. The outermost (in the habitable zone) Neptune sized planet, could have several (dare I say "earthlike") human tolerable (gravity/temperature/liquid water(oceans?!)/pressure) moons.
Man, it is hard to wait for another decade to get the hardware that can start better characterize extrasolar planets.
Everytime, I read something like this, I marvel at human beings capacity for silly warfare over our meagre Earth's resources, when we could be cooperatively accessing the bounty of the universe.