CASA) Image Cutter software to view a stunning panorama online, as the live example below demonstrates (you can close the preview window by clicking on the bottom right hand arrow, navigate using the standard Google Map interface):
The software is aimed at easy viewing of giga pixel images over the web without the need of a plugin. Using the Google Maps interface it 'cuts' up the image into thousands of sections and then creates a web template which can be modified for own usage or embedded into a blog etc.
Take a look at Neil's site for more panoramas and thanks for the comments on the software so far Neil. If you would like to try it yourself,download version 1.1