Thank you for the suggestion, I've seen other forums with that feature and it does prove to be useful for previewing a post before releasing it. We purchase a software package to run our forums on from a company that specializes in catering to forums such as ours and we don't have that feature available to us.
However, we do have a 10 minute edit grace period that allows edits to a post before the "edited by" line appears.
Again, thanks for the suggestion. We appreciate such input from members.