Connecting a Fan page to Twitter is easy with the official Facebook/Twitter integration, but if you have a Facebook Canvas App (which you need for making cool Website-Facebook-Integration stuff) then you where out of luck. Until now.
Facebook released last week a option to subscribe to the RSS feed of any Fan Page and App Profile Page. The next step is simple – use one of the many RSS to Twitter Services (Twitterfeed, Hootsuite, etc) out there and feed the RSS Feed into your Twitter Account. No rocket science but useful nonetheless.