I understand the thermette is copper also, which might be a plus for some folks.
Heavier, but rather nice looking I think.
http://www.thermette.com/thermette_whycopper.htm
Here is a very interesting list of woodfired kettles of this type:
http://en.wikipedia.org/wiki/Storm_kettle
The bit on the russian samovar is quite interesting.
"Further similar designs
The Samovar is a similar design that predates these other kettles. It was used as a household appliance rather than camping gear. It also has a hollow fire tube and water around it which is heated. It is used to make tea."
Somovar article in Wikipedia:
http://en.wikipedia.org/wiki/Samovar
I thought this bit was particularly interesting...
"Afterwards, fuel is added. Instead of charcoal, Russians traditionally use dry pinecones. Cones add a hint of the resin's flavor to the tea. When using charcoal it is important to use unprocessed lump charcoal. Commercial compressed charcoal can burn with such a concentrated heat that it is possible to damage the samovar, especially if the water level falls too low. No matter what fuel is used, it must be ignited. The traditional way is to use pieces of bark from the birch tree or small dry fir tree twigs called pautina (cobweb). In the Soviet era, a popular joke had it that Pravda, the newspaper of the Communist Party, was particularly good for tinder. Paper in general should work. An alternate method is to set the charcoal burning in a fireplace or brazier and transfer the coals to the samovar with tongs."
It would be interesting if there were any more practical shaped Samovars are made for backpacking. I suppose its hard to beat a plain old tin mug and three rocks for practicality.