Irrational Games has released the first of what could be a series of developer diaries for the upcoming
BioShock Infinite. The first edition goes into the concept of Sky-Lines and how they fit into the Infinite world and Columbia.
Sky-Lines appear to be not only an integral part of the infrastructure of Columbia, but BioShock Infinite as well. I really hope that this plays as good as it looks because the combat mechanics and integration of the Sky-Line look awesome...