AFAIK they shut down everywhere except the US.

Here in Australia, pandora.com currently redirects to a 404 page (it has been this way for years)[1].

[1] https://news.ycombinator.com/item?id=25524801

Pandora is still around. They were acquired by SiriusXM, and a lot of the Pandora functionality was brought into the SXM app. Though I believe the standalone app is still available and working.

Wasn't it pandora who acquired rdio?

still works