Apple's new iPhone 4S may be the highlight of today's big "Lets talk iPhone" event, but we're willing to bet that there are a whole lot of people interested in picking up an iPhone 4 on the cheap. You'll now be able to score yesterday's top-of-the-line device for just $99 for the 8GB model and the even older 3GS for free. Of course, these require two year contracts, so keep that in mind if your interest has been piqued.