Looking into giving up cigarettes, I found these on DealExtreme. Reading reviews, people's main concern were the money issues and are substituting real fags for these things - in theory saving loads of money. My main concern is my health.
Anyway, might help someone else in giving up or at least help in cuttting down on their smoking bill.
You can also smoke these things indoors without worrying about passive smoking.
Not sure if currency conversion is correct - you can also buy the refills on the site cheaply as well.