Interesting shift from Twitter:

If you live outside the United States, our services are now provided to you by Twitter International Company, our company based in Dublin, Ireland. Twitter International Company will be responsible for handling your account information under Irish privacy and data protection law, which is based on the European Union’s Data Protection Directive.

Essentially, if you’re a non-US Twitter user, any data protection issues around your Tweets are now handled under Irish law, not US law.