thank you for org2blog. I am enjoying it.
I am using org-id with '(org-id-link-to-org-use-id (quote create-if-interactive))
I link from one org heading to another using the PROPERTIES ID.
It would be nice if org2blog could intelligently translate private ID links into the appropriate public-facing URLs, so that links will work seamlessly: entries that link to one another would become blog posts that link to one another, either using the POSTID or the PERMALINK.
Support for other forms of Org links could also be useful, like file links.
I notice that Org2blog also uses the ID property with an o2b prefix.
I would be willing to pay for this feature.
I am not entirely sure if this is what you were asking about, but I think you meant making links exported by org mode globally unique.
I made a simple hack that works for me: https://kozikow.wordpress.com/2016/06/05/make-internal-links-exported-by-org-unique/ .