Rumor: Apple iPhone price/data plans confirmed?

According to a leaked photo circulating around the internet, Cingular (AT&T)
has revealed final pricing and data plans on the iPhone.
Final prices are stated at $299 for the 4GB version and $399 for the
8GB version. Data plans listed are Cingular MEdia plans that bundle
text and data, as well as stating that the devices can be purchased
with a GoPhone Pick Your Plan type of prepaid service requiring a debit
or credit card.
More details and confirmation to come as this is
certainly an interesting, if not welcome development.