I doubt we're unique - sites around the internet with heavy Delicious integrations are screaming to a halt.
If you check out their tools page (http://delicious.com/help/tools) you'll notice the developer documentation is "coming soon". Yet basic functionality like the feeds.delicious.com URL are now returning a 404.
You can use the same API structure as previously http://delicious.com/v2/json/tbull001 and it will return a result that has the same structure as before (or at least the same elements I used in my code previously).
But what I've noticed about this is that instead of ALL of my links, the end point now only shows me the links that are new since I transitioned to Delicious.
In general Delicious seemed to do a pretty good job communicating with users - they've done a terrible job letting developers know changes are coming. Or did I miss something?
Is anyone else having issues? How are you resolving them?