Here is what it does when you try to log back into Origin. It takes you to a screen where you would create a new account. If you wait a minute or two an error message pops up over a black screen.
It says: Error
The Origin network could not be reached. Please check your network connection and try again.
So, it is definitely down. I have wireless on and it's still not working.
About The Simpsons Tapped Out General Discussion
Talk about your The Simpsons: Tapped Out experience with other TSTO players.