Very impressive for a fully automatic panorama program. The seams are very nice and seamless.

And it runs fine on Linux (with wine). Took some shots of the back yard and fed them thru it; can do some crazy things ...
... if the images are not upright:
http://members.optusnet.com.au/~janosk/misc/pano-0.jpg
... or not all oriented the same:
http://members.optusnet.com.au/~janosk/misc/pano-1.jpg
but after rotating them upright (and omitting one of 9 pics which had some confusing foreground) it did a good job:
http://members.optusnet.com.au/~janosk/misc/pano-2.jpg