In forums such as the games forum and flash general there are loads of posts where the links to the game in the first post are not the freshest link, this means that the person reading will have probably played the wrong version and even then may not see the link at the bottom of the post pointing them to the new one.

If you asked most people then they'd probably agree that if you're going to stick to the time restrictions for editing then at least the post creator should be able to have a separate field which he/she can edit which points to their WIP or game. It would make all the posts much less confusing and although it could be hard to implement in the needed forums, I think overall it would be a great addition.

You could put this in the additional options as to not confuse the newer posters.