I am adding a set of interlinked tours to my local tourism site on http://www.virtual-swanage.co.uk/gallery/pan/default.aspx
We have added 32 so far and have another 20+ planned for this summer. Some of the tours have hotspots to link between them and once all the tours are complete we should have at least 4 hotspots on each of the 50+ tours.
The latest ones have been taken using a diy panoramic head myself and my brother made, there is a build log on his blog on http://www.andrewdorey.co.uk/blogdetails.aspx?p=3&c=1