40310688ed
This is used for the code that determines where to come out of Limbo in. It tries to search from the top down to find a solid block to stand on. Isn't complete, though. This code does need some considerations put in, though... I'm concerned about Natura's clouds, for instance.
DimDoors
Dimensional Doors for Minecraft Adds several items that allow the player to move between and create dimensions
see the MC forum topic for details