Blogs are intended to be a workspace to manage secure information. The action of publishing a Blog creates a unique and highly random (secure) URL i.e. each person that the Blog is published to is provided with a unique URL. The Blogs itself does not have a general (non-secure) URL.
Yes, by deleting their address and adding it again the system will take care of everything, including sending an email with the info. The email does suggest bookmarking the address. Perhaps they need a nudge.
Any possibility of enabling pulling emails from our contacts when entering emails for blog publishing instead of having to key the emails in directly? It would be nice to just type in their name and have the email pulled instead.