I've created this 180 degrees panorama from 16 photos taken out of my window (3 rows: 6 + 6 + 4). The original picture is huge: 5000-something pixels wide and high and approximately 22Megs (jpg) fat.
If you want to test it yourself just
aptitude install hugin and make
sure to get enblend from somewhere else (eg,
debian-multimedia.org). If you don't
install enblend you don't lose functionality, but the output will be of
much lower quality. Thanks Florent Bayle for packaging hugin and
Christian Marillat for packaging enblend!