It's an easy way for people too accept payment over the internet. I can get money from people with credit cards without having to deal directly with the credit card company. It's really popular for buying things on ebay.
I'm supprised that you've not heard of paypal. They accept payment "in U.S. Dollars, Canadian Dollars, Euros, Pounds Sterling, and Yen". I would say that you could send me a check, but that would actually be more difficult since I'd have to send it for collection.
Some tips..... Once your you clicked on "Become a supporter", if you do not live in us, you can click on "Outside U.S.?" beside the location then select your country bellow.
If you are not sure how much of your money worths how much us, you can calculate that here: http://www.xe.com/ucc/
I think that it's unknown in Europe. How can we support Caedes?