At a press conference at CES today we learned that Cingular has intends to initiate its rebranding to AT&T (not AT&T Wireless) by mid-year -- in time for the iPhone launch. While they weren't entirely certain of an exact date, they definitely seemed determined to make sure the AT&T branding was firmly in hold by the time the industry-changing device. Cingular couldn't officially confirm whether Apple could or couldn't make an identical device without a cell radio (i.e. the "true" video / widescreen / WiFi iPod), but they stated "Apple can build [their] devices." Other interesting Cingular / Apple bits:
It was again confirmed that customers must agree to a two year contract, even if that requires customers to renew their current service.
There is no iTunes revenue sharing.
There will be no physical branding on the iPhone but Apple branding. The only AT&T / Cingular branding will be on-screen where the carrier readout is shown.
Although nothing was confirmed, Cingular made it sound as though users might be able to expect a specially bundled data plan for the iPhone.