Both black and white and comes in three difference capacities: 16 GB ($199), 32 GB ($299), and 64 GB ($399). All prices are for on-contract purchases.
The iPhone 3GS (8GB) is now Free with contract and the iPhone 4 (8GB) has been reduced to only $99 with contract.
Apple introduces the iPhone 4S and breaks down all of the new features:
Here BBC does a quick hands-on at the Apple Event.