Update: the google maps API has changed and the code is currently broken; it seems to be related to authentication/CORS.
Usage: click in the map for a new location (must be within 50m to the next available google streetview data)
using GSVPano.js, the Google Street View Panorama lib by Jaume Sanches Elias (http://www.clicktorelease.com)
There are a few known issues with the projections and the code, it may be fixed at some point.
Thanks to Leo for the Moebius projection!