The existing viewer snapshot system (control-shift-s) is being extended to add a mode where you can take a picture that encompasses all directions at once.
Placed in a suitable web site with some HTML and JavaScript, the image can then be scrolled to look around as though you had a window into Second Life at the moment the picture was taken. Please visit our wiki for details
This is also integrated with a number of other Snapshot improvements contributed by the author of the Black Dragon viewer.
This latest update is current with all changes from the latest official 4.1.2 Second Life Viewer release.