false alarm in January, it seems that the Vatican is indeed now putting out Twitter feeds in various languages. See: the article New Vatican Internet Services at the Vatican Radio website.
The English language feed for you to follow is: @news_va_en. Next challenge is to get in a bit quicker and snap up something better like @Vatican (not an official feed.) Or they could speak nicely to the owner, Pablo Arratia, offer him some financial compensation, and persuade him it is the right thing to do. Heck he might even waive the compensation. Has anyone looked into this?
Anyway - it is good to see official Vatican feeds on Twitter.