Panorama At Once with EOS 1Ds
One shot panorama of the harbor of Hoorn in the Netherlands, made with the 1Ds and the Sigma Fisheye lens, converted form fisheye to panorama in Photoshop with Panorama Tools Remap, settings: Fisheye Hor. --- QTVR-Panoramic and 135 --- 90.
Cropped to 16:9.
Advantages: wide field of view in the horizontal as well as in the vertical direction (great for sites like the Grand Canyon), one shot will do, no tripod required, no problems with moving objects, no special settings to keep WB and exposure constant, no stitching.
Of course a Mark II would do even better.