I am now logged in as my 1150xxxx username, having reset the password.
My playlists show up, but I get similar behaviour as before - no ability to play or download.
Offline and Sync Management tells me that no network connection is available, though it let me log in and can refresh the ""what's new" section. If I select one of the what's new albums, the list of tracks shows up. Attempting to play a track results in the progress "dots" at the top of the app sliding along endlessly and no music ever plays.
Any more ideas?
One extra note for you that may have influenced me. I had uninstalled the app from my phone yesterday and so did my other family members. You can try removing the app, power cycle phone, reinstall app then try logging in with device id and password.