It seems as though Apple is designing a lot of new Mac and iOS features from the perspective of people whose internet access is the equivalent of an all-you-can-eat buffet. Photo Stream is a perfect example. The feature, built into Apple's new iCloud service, automatically uploads photos taken on any of your devices to iCloud, which gives you near-instant access to them on all of your devices.
It's a great feature, and it's already streamlined the process of getting photos from my iPhone onto my iPad and Mac. But it was only this morning that I realized with grim horror what might happen if I imported 8 GB of RAW files from my DSLR into Aperture. With Photo Stream's default setting