iPhone 3GS already sold out on pre-orders alone

Apple and its US operator ATT have announced that every one of the new iPhone 3GS phones made available in the US for Friday's global launch have all already been reserved.

Any orders placed after June 13 won't receive the handset on launch day, although a small number of phones has been reserved to sell in stores.  However, the exact number of units currently available.  Some people have suggested that sales are not likely to be as fast as with the iPhone 3G, which shifted a million units in just three days.