So has anyone done this? can be done? On wordpress admin, when you click List Pages, or List posts, I want to make a drag&drop in order to sort the pages/posts, but before I start I want to know if someone has done it already, or if there is a plugin for this.
The My Page Order plugin provides an easy drag and drop interface for re-ordering pages and subpages (as well as a helpful option to make all the pages available directly from the pages menu in the dashboard).
I've created a plugin called CMS Tree Page View that perhaps does what you are looking for.
From the description of the plugin: "Adds a tree of all your pages or custom posts. Use drag & drop to reorder your pages, and edit, view, add, and search your pages.".
You can find it at the WordPress plugin repository: http://wordpress.org/extend/plugins/cms-tree-page-view/
Thre are some more alternatives too:
There are many plugins out there that create the drag and drop functionality and the best one I've used is Post Types Order
There is plugin out there for this:
Manage your multitude of pages with pageMash's slick drag-and-drop style, ajax interface. Allows for quick sorting, hiding and organising of page pare