In working on my self-hosted blog, I was looking for the Writing Helper module that's available on the WordPress.com site (http://en.support.wordpress.com/writing-helper/).
Specifically, I was looking for the ability to share a link to a draft article with reviewers.
That's when I found your plug-in. It does most of what I was envisioning for my needs!
Thanks for making it. I noted that it wasn't reported to be compatible with the current version of WP (as of this writing, v3.6.1), but I needed the functionality enough that I tried it anyway. It seems to be working fine, and I reported as much on the plug-in details page.
As a UX note, I'd recommend making the draft link actually appear on the article's page in a non-editable field that users can see, select, and copy. It'd help with the visceral feeling of having copied the link.