I am not good expressing ideas. They look good in my head, but I have a hard time explaining it worthy to others. So bare with me.
What I would like to see is a backend post area where you can have sortable content modules.
Lets say for example I want to have a post with an intro text, a poll module, another paragraph of text, a google adwords area and at the bottom I want author info and social bookmarks.
Now having all this in one post can be kinda frustrating and hard to overview. Especially when you come back later and want to edit, add or delete something in the post.
If I would have the option to choose a module for content like this and sort the modules in the way I want them to appear in my content this could be much easier.
Modules could be developed by the user like plugins. They could have their own options.