I published the HTML5 Panorama Viewer last year, and have finally had the time to make some updates, including support on touch screen mobiles. I've tested on several browser for Android (bulti-in, Firefox, and Opera Mobile), as well as Safari on iPhone; it's looking good, but please report any issues you might find. Known limitations include click and move lag on older phones, no support for history management in some browsers, nor multi-touch in most (thus no pinch-zoom yet).

Desktop controls:
Zoom in: double click
Zoom out: right click
Move: Hold and drag

Mobile controls:
Zoom in: double click (can be a bit tricky)
Zoom out: hold without moving for more than 2-3 seconds
Move: Hold and drag

Licenses: The JavaScript and HTML coded for the viewer is licenses under GPL3. The copyright of the panorama images are retained by the author.