For anybody going to be in the Pas de Calais area of France or is able to reach it easily (the chunnel isn't that far) there is a neat bike for sale on French ebay:
http://cgi.ebay.fr/
It is made by the Manufacture Française d'Armes et Cycles de St. Etienne.
Even if you are not interested to purchase, it is interesting to look at. Persoanlly I have only seen one ever being used.
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Steven Maasland
Moorestown, NJ