Very useful + 1 suggestion

Great job!
This plugin adds a missing WP feature, especially for sites where several users are editing pages/posts and you need to now when this last happened.

I don’t really understand why this is not part of core, but I would also suggest – if possible – to add the author of the last edit. Same problem here: WP not only displays just the date of initial publication but also the initial author only. It would really be extra-great if we could also get the author that has last modified a page/post!