Beginning tomorrow (Saturday 8/23/08 AD) the 657 area code overlay is in full effect. That means that if you live in the 714 area code and you are dialing someone in the 714 area code, you must now dial the 714 area code in addition to the phone number (whereas previously you only had to dial the seven digit phone number).
Check your speed dials and get used to the added digits.
The low down on the details.