BoyGeniusReport published a list of details about the new Apple iPhone, which is expected to be announced around mid-June. The site claims the following details were all 100% confirmed by a "high-placed" source at AT&T:
Faster and more seamless experience (could be just about iPhone OS 3.0 though)
U-Verse application will let you control your DVR
Apple is planning to release new iPhones on an annual basis
AT&T is said to be working with Apple to create a unified product with an unparalleled experience across all their products and services.
The new iPhone will have more capabilities, similar to other high-end phones
HSDPA 7.2Mbps is possible
There was also a report at MacRumors today, they claim the iPhone may feature the Marvell PXA168 1.2GHz ARM processor.