Apple is known as one of the most secretive companies in the world as it tries to keep future product announcements close to the vest until the day when a new product is revealed. It goes without saying that rumors and leaks about future Apple products and activities are not something the company condones.
That's why it's ironic that Apple's polices for employees to follow in regards to leaking information, among other things, has in fact been leaked out to the Internet. 9to5Mac.com reports that it has received the full policy document which includes how Apple employees should handle writing on social networks such as Facebook, how they should conduct themselves on personal web sites and so on.
Much of the policy regulations are common sense items when a company is dealing with protecting its information from becoming public. The documents state, "You may not disclose Apple confidential information to an outside party unless a written agreement or license has been previously signed and approved by the division vice president."
While Apple employees are given an @apple.com email address, that address is used strictly for business. Employees can use an @me.com address for personal use.
Obviously there's no speculating at all online on any rumors about the company or its products. If you work at Apple you can still create your own personal blog or web site but discussing anything about Apple in any way on those sites is out of the question.
Employees can also use social networks like Facebook but are encouraged to use their best judgment before they post anything. The policies state that Apple team members should, " ... be thoughtful about how you present yourself in online social networks. The lines between public and private, and personal and professional are blurred in online social networks.”