I have to deal with many panos in my tours and was looking for a thumbnail menu which allows me to categorize my images.
What I found was this nice-looking solution:
http://www.troissixzero.fr/plugins/27-menu-horizontal.html
It's a flash plugin with a xml configuration file which is quite simple to install. There are many options to customize the look and size of the menu, it can even handle different menus for every scene.
I would like to thank Marc Jobin this way for doing a great job and hope you find his plugin as attractive as I do.
Bernhard