Just how much of your iPhone's address book – your contacts' names, email addresses and phone numbers – is being stored on Twitter, Apple, and other companies' servers?
For users of some iPhone apps, the answer is everything.
Surprising? It's just that surprise and lack of transparency that has given rise to major privacy concerns, leading members of Congress to send a letter to Apple this afternoon to clarify and correct the situation.
The story really begins two weeks ago when a...Full Story