Apple has invited a small number of journalists to a special press conference, expected to be held at its headquarters in Cupertino, CA, to discuss the iPhone 4. Apple has not indicated who will be speaking at the event, which will begin at 10:00 a.m. Pacific Time on Friday, nor has it given specifics about what exactly will be discussed, beyond saying that the event will focus on the iPhone 4. Most likely, the company will address concerns over theā¦