Please consider adding to the manage post area, a feature that would duplicate a post, add it as new/draft. Many times I publish a very similar style/theme/format of post. Having this would cut a ton of time off that task.
Actually, this is there already, just install the Boilerplate extension. Duplicating external content from a simple table overview is not that simpIe suppose. Duplication also is not a core feature and this menu only features the core functionality.