I am. I've verified username, password, and have tried both the Pinboard and Delicious options, and now I'm getting the "Oof! Delicious rejected that username/password" error.

Logged out of delicious, logged back in to verify the credentials. Restarted the browser and tried again -- same error.

On the upside, it's easily one of the best login screens I've seen, and the error animation is quite nice. :-)