Hey, great plugin. I really like it a lot, it solved a couple of big issues I was having with a few sites.
However, this could be so much more awesome if it had a few more features. I don't have time to do them myself right now, but if you're working on a new release, here's a couple ideas:
1. After creating a custom link, append it to the list of pages and posts so that you can use it again without having to retype everything.
2. Add Media as a third type of related item-- I work on sites that have a lot of PDFs that they want to make available to their users-- I know I can use a custom link to link to them, but if media has its own type, I can style it differently (like by giving PDF docs a little PDF icon next to them, that sort of thing)
3. Rework the User Interface:
Right now I'm working on a site that has a TON of pages and posts. Putting them all in one list is kinda cluttering it up. It would nicer if there were tabs for each type that you could switch between.
Thanks again for a great plugin! Looking forward to updates in the future.