See http://del.icio.us/PrattInteractive/QTVR+panos for a list of web sites with technical information, software, hardware, and galleries of panoramic photography.

Sometimes artists will create one single image, then compile it as a QTVR panorama. When preparing single images in Photoshop, its important to use only particular dimensions that the panorama software can handle easily. Here's a table with typical ratios...