To be honest, I am not so thrilled with the Kindle International edition as I fear how this will impact on the format war and eventual competition in the marketplace.
For a start, I am not sure how epub is going to hold up once kindle's own format dominates as their sales increase. I seriously doubt that kindle will eventually move to epub now that they can sell their format in other countries.
with its huge library, I think competition against sony and others will be moot, as most people will be more than happy to buy a kindle and not worry about whether they will be able to find the books they want to read.
although more books might be available if you are willing to search ebook sellers and that open format devices have more options, for the average person who is not aware of the ebook technology, kindle will be their first choice as its simple to deal with one store. And as time goes by, i assume publishers will have no choice but to line up with amazon.
to top it off, now that they have gone international any chance of Sony getting a larger share of market for competing against amazon has gone the way side. ..
