They've already announced that they -will- release the mod tools for Skyrim. The question is how long it will take someone to come up with import/export tools for the meshes, and they are not using Gamebryo tech this go around. Also some question about adding new animations, as the system they have now combines Radiant AI, Radiant Story, Havok Physics and Havok Behavior to control and drive things....and Behavior is a new module, and Skyrim looks to be the first major game using it. Take a peek at Havok's website to see what we may be in store for. Behavior looks like a cross between Character Studio and Massive......

 

Think about it.......