Apple has officially confirmed an iPhone-based event for October 4. Invitations have been sent to various media regarding the press conference, which will be held at 10:00am next Tuesday with the tag line "Let's talk iPhone."

As per previous rumors, the gathering will take place at Apple's campus in Cupertino, California. The company has traditionally held big announcements at the Yerba Buena Center for the Arts in San Francisco. Why Apple decided to move the iPhone event to their home base is still a mystery, but there are some pretty good theories.

This will be the first event led by new CEO Tim Cook since Steve Jobs stepped down from the position last month. It's possible that Apple wanted to keep the event close to home so Cook would be more comfortable. Other signs point to the San Francisco venue being booked up already or the possibility that Apple wants to demonstrate LTE capabilities of the next iPhone.

And we're still no closer to knowing exactly what Apple will introduce at the event. Speculation has pointed to either a slightly modified iPhone 4, being called the 4S, or a total revamp known collectively as the iPhone 5. An iPhone 5 could include anything from a larger screen, thinner footprint, better battery life, NFC-capabilities, LTE capabilities and more. About the only thing that seems solid is that the new iPhone will feature the A5 SoC found inside the iPad 2.

We'll know for sure by this time next week.