Panoramic stitching is one of my specialties, images ranging from 5 to 22 frames all seamlessly stitched together.
Many people try this technique and get it very wrong, good images have a an even exposure through all the frames,
the horizon is level and the scene is dynamic.
I like to add a degree of difficulty with moving water which requires planning and perfect timing.
For more Panoramic images visit: http://www.redbubble.com/people/kenwright/collections/67342-panoramics