Their video is seamless because it isn’t stitched together.

An article they published on how they made this can be read here:
http://risingfromruin.msnbc.com/2005/11/you_write_the_c.html

Apparently the equipment they used had a cost of over $15,000.
I wonder if the cost has decreased since then.

The ‘poor man’ process I used is not nearly as proper but can be accomplished with less than $2000 of equipment and software (at student discounted prices).

Another somewhat related link of interest is “Wild Sanctuary” which allows you to listen to various kinds of ambient noise on Google Maps or Google Earth.

Also it will be interesting to see if Microsoft begins incorporating stitched panoramic video into their cool newPhotosynth system.

Photosynth’s architect Blaise Aguera y Arcas presented a demo on this technology at TED which can be viewed at:
http://www.ted.com/index.php/talks/view/id/129

Thanks!

-patrick