Glad to help, but the answer is no, not currently for all three questions. I do like the idea of Ajax support, and will be looking at a way to add that in a future version. Feel free to post again if I may provide any further information. Thank you.
Couldn’t the PHP-script just pull the latest post from the database and then just get the URL that way? It should be the one the user posted (unless you got a huuuuge amount of traffic). I could live with such a solution. 😛
But I’m not good enough when it comes to PHP and exactly where I would place the code…
Some PHP to get the latest post URL:
https://coderwall.com/p/7njuaa/linking-a-wordpress-menu-entry-to-the-latest-post