It was called Panosalados. If you google it, you will find resources of version 2 that supports deep zooming but is a bit difficult to handle (at least I never got it working :-D)
On my website I used the simpler version 1.
At a certain point the developers site got hacked and infected by a virus, there was an uproar in the user community, the developers lost interest and so the project died.
I have attached the html/js/swf/fla files I used for the pergamon panos. Try extracting the folder and open index.html in your browser, if something happens. Maybe you can use it to get started.
the 6 square images are inside the “images_medium/images_01” folder.
It was MIT licensed so I guess it is okay to post it, the license files are included.
panorama.zip (2.77 MB)