Fun toy. Weight is definitely an issue. My Nikon D700, which is lighter than your 1D, still spends a lot of time sitting around at home, where I'll instead bring along our cute little Panasonic LX3 (which oh-so-just fits in a pocket). The big camera is great for "serious" work, but I wouldn't want to hike up a mountain with one. The LX3 is great for casual stuff.