Well, I never tried due to lack of time and because I'm doing ok with VISA, but I know there are some portuguese sites that provide passwords via SMS to download a movie or something like that. Knowing the local market I'd say that's a good choice, eg. if I had a site with portuguese as the main language, I'd go SMS. I suspect the same aplies to other european countries.
Anyway, I think VISA and a global site is the way to go
