This links to a great definitive piece on Chimney Science and the legendary Count Rumford.
If you have any chimney / fire problems - study Count Rumford first (then buy a chimney balloon!) and thank Jim Buckley for his site.
(U.K.) The National Association of Chimney Sweeps
American Hot Air Ballooning Magazine
American National Chimney Sweep Guild, with good content and links (some International)
(American) Chimney Sweeps of the World
(Australian) Chimney Cap for external installation on chimney top
(Dublin, Ireland) Try going up this Chimney! A great tourist conversion of an old chimney - flue with a view
Salute Fearless Steve Fossett's Circumnavigation of the Globe!
Per Lindstrand - the Doyen of Hot Air Ballooning
Pot Spotters Paradise (U.K. - it had to be...Home Site of the Central Pot Spotting Authority of Great Britain and Ireland) - has someone been smoking strangely?
Lost? Find what you seek via Google.
Still Searching?Try Dogpile - a searcher of search engines - go get'em Towzer!
Stops your energy money going up the flue.
Saves £ $ £ $ £ $ £ $ £ $ £ $ £ $ £ $ £ $
Twice the comfort - half the heating cost!