With the introduction of the 7D, Canon has fit a camera neatly into both the resolution and cost gaps that had formerly existed in their DSLR lineup. Now there's a smooth progression of resolution from 10 megapixels to 21 at roughly 2 or 3 megapixel increments, and a $1700 camera to fill the gap...
Good image quality; Great continuous shooting rate with JPEG files; 8 fps high speed shooting rate; HD video
Cost; 72 dpi output of images