Today I hopped on the bike with my iPhone and SLR and went scouting locations for an upcoming stock shoot. I brought both devices for different reasons. The SLR was brought so when I do find that great location I can take a shot with the lens of my choice and get a really good sense of whether or not it will fit my plans.
The iPhone, on the other hand, serves a different purpose. With the iPhone, I can bang off a bunch of quick shots but most importantly each of those shots is geotagged. I don't have to scribble down all the locations because the iPhone is already gathering that information for me. So sweet. :)