Amazon Deutschland, just as friendly as Amazon USA, except in German
Amazon France, almost as
friendly as Amazon USA, except in French
Amazon
UK, for British books unavailable in the US
Chapitre, for French books,
and some European books (use Explorer or Firefox)
Libreria Bosch, in
Barcelona, for legal books, including canon law, published in Spain;
very friendly and helpful
people.
IBIS: International Book Import Service friendly, inexpensive and quick; I like these people!
Der Buchwurm, books,
magazines, music and films from Germany
Alapage, an excellent source for Italian, French, German, and Spanish books, movies, and music.