The ‘DL122′ urban bike concept by French carmakers Peugeot features a built-in carrier for laptops and documents. A briefcase or laptop case can be fit securely between the two walls of the main frame and even locked into place, thus offering better protection for the device. Most innovatively, the design also provides better balance for the bike by maintaing the site of the center of gravity, in contrast to the use of baskets or backpacks for storage.

Thanks to designboom for the info.