Very good news for all Kindle owners outside the US: Amazon is no longer adding a $2 wireless download charge to every Kindle ebook!
http://ireaderreview.com/2010/05/28/...utside-the-us/
"For non-U.S. customers, there are also no additional charges for wireless delivery in or outside your home country."
They are, of course, still adding VAT (in the EU), but this is usually small for most books compared to the $2+VAT fee previously added to the cost of every book.
I can only think that they've got some direct data deal worked out with a international carriers, rather than relying on an international roaming agreement.
And, wow - some UK prices are better than the US prices! E.g. The Girl Who Kicked the Hornets' Nest is only $5.72 at the UK Kindle store, compared to $9.99 at the US Kindle store! (Because it's already out in paperback in the UK.)