Yesterday, Apple announced that it will make an announcement on September 12th. Apple didn't actually say what the announcement is for — the invitation to select journalists simply states "It's almost here" — but we all know that it will be the new iPhone. The invitation includes this picture:
The "12" surely corresponds to September 12, and the shadow shows the number five. That could simply refer to the fifth anniversary of the iPhone (which debuted in 2007), but I think it more likely means that the next iPhone will be called the iPhone 5.
We'll find out next week what the new iPhone will include, but Macworld has a good summary of the current best guesses, including fast LTE connectivity, a bigger 16x9 display, a smaller dock connector, and an improved camera.
The announcement will occur at 10 Pacific / 1 Eastern on September 12 at the Yerba Buena Center for the Arts Theater in San Francisco.