Rather than copying this letter, people should each write their own letter as it will have more impact than if they receive a hundred "clone" letters. Print it out and mail it for maximum effect.
Sending letters about accepting an internet currency through regular mail?
but yes, Ive sent in mine and every bitcoin/amazon user that would like this implemented should let them know, I also let them know I will be doing my shopping through Overstock until bitcoin is implemented, I'm not sure if money should be considered speech, but it is certainly a financial vote