Hi, I was wondering whether you have thought about adding the ability to manually add posts to the returned related posts list?
So something like...
Edit a post.
A section where you can select other posts to add to the list of returned related posts (any post type).
These manual ones should be able to be ordered.
You should be able to select whether to add your manual posts to the top or bottom of the normal list of related posts.
A select to display either: only normal related posts, only manual related posts, both.
(Note that when I say "normal related posts" I mean the current functionality of the plugin)
One thing that our clients are always wanting is not only the normal auto generation of related posts (whether it's through your type of system or tags), they usually want to be able to add their own posts to this list as well.