How do you link a Twitter account with a Facebook PAGE?
I've done it before but I think they changed the process...
Depends on which way.
The opposite way there is no official channel but many apps are available such as Involver.
the Twitter application appears to be working correctly again. Simply login to the Twitter application on Facebook (and under "connect your accounts" click on the "Sign in with Twitter" button), and you'll be able to connect Twitter to your Facebook account and post status updates to Twitter.