USB 3.0's New Jacks and Sockets

The Register has a brief look posted (with photos and diagrams) of "USB 3.0, the upcoming version of the universal add-on standard re-engineered for the HD era, made a small appearance at the Consumer Electronics Show (CES)." The posting explains that USB 3.0 "wasn't demonstrated in operation, but we did get to see what the new connectors look like." How does it handle backward compatibility? The extra pins needed for USB 3.0 "are placed behind the USB 1.1/2.0 ones. USB 3.0 connectors and receptacles will be deeper than the current ones."