Thanks to all who replied. Very insightful. (If this were slashdot I'd give you 5 for insightful). I totally forgot about the radiation belt. That really puts a dampener on the whole concept. About colonization, I am in the "camp" that subscribes to the idea that Earth will eventually become...
I am writing an interactive fiction roleplaying game. It is futuristic... in fact centuries away. We have discovered that the core of Europa is indeed liquified iron, silicon (and sulphur gas?) The oceanic layer is indeed liquid water. Not only that, but it was discovered that a very thin layer...