I took these amongst other images in March this year.
I only found out about a decent Panorama software (Panorama Factory) recently.
Here are 2 panoramas of the Grand Canyon. Cameras Canon 20D and Canon 40D.
http://www.pbase.com/gregbradley/image/105350101/large
http://jjd.pbase.com/image/105331323
You can go right into them by clicking on original at the bottom of the image. They are approx 50 and 35 megapixel images.
Greg.