I stumbled across Hugin, an open source photo stitching application, after hearing about OpenStreetView in a podcast interview with Steve Coast.
I’ve been interested in panoramic photo stitching since we first experimented it for these Quicktime VR panoramas of Green Gables back in 1997 (interesting side-story: those panos were used to help investigate the fire at Green Gables that happened only weeks after the original photos were taken).
The state of the art has come a long way since the clunky old (but still somewhat amazing) Quicktime VR authoring tools, and Hugin is a great example of this. After installing it, I dashed out the front door of the office and snapped 8 photos of the new Homburg Skyscraper:

Ten minutes later I had this: