How to Restore a WordPress Post Using Post Revisions
http://thedigitalfox.com/wordpress - One feature of WordPress that often gets overlooked is the "post revisions" option ... So what are post revisions, and how do they work? Revisions are simply a way for WordPress users to keep a working collection of each different version of a post, and then revert back to it in the future if necessary.
For example, if you've accidentally deleted some content from a WordPress post and want to get it back (even after you've already clicked the "Update" button), you can use the post revisions feature to revert back to your original content.