I asked amazon why Silk is only available to the US. Here is the answer:
Hello from Amazon.com.
Thank you for writing to us about purchasing downloadable products
on Amazon.com. Due to import/export laws and other restrictions, we
are only able to sell eDocs, Amazon Upgrade, Amazon Unbox videos and
other downloadable products to customers with U.S. billing
addresses.
It is always important for us to hear how customers react to all
aspects of shopping at Amazon.com. Strong customer feedback like
yours helps us continue to improve the selection and service we
provide, and we appreciate the time you took to write to us.
I've included some more information about international orders below
in case you have further questions. Please know that Amazon cares
about its international customers and is working on ways to improve
your service and selection.
Thanks for your understanding.
*****
CAN I ORDER FROM YOUR INTERNATIONAL PARTNER SITES?
Some of these restricted products, such as software and video games,
are available to selected destinations from our international
partner sites. You are always welcome to order from any Amazon web
site regardless of where you live. Information on our international
sites is listed here:
http://www.amazon.com/international/ *****
HOW DO I KNOW IF A SPECIFIC ITEM CAN BE SHIPPED TO MY COUNTRY?
All books, music, video, and DVD items can be shipped to any
international destination that is not restricted by the U.S. State
Department. Some software, electronics accessories, kitchen and
housewares, and hand tools can be shipped to a non-U.S. destination.
If an item can't be shipped to your destination, you will see a
message to that effect when checking out.
*****
WHERE DO I FIND MORE INFORMATION?
You may find these related Help pages useful:
Amazon.com Shipping Policies & Rates
http://www.amazon.com/help/shipping/Ordering from Amazon Merchants
http://www.amazon.com/o/tg/browse/-/537794/*****
Please let us know if this e-mail resolved your question:
If yes, click here:
http://www.amazon.com/rsvp-y?c=fwgvdvru3332901043If not, click here:
http://www.amazon.com/rsvp-n?c=fwgvdvru3332901043Please note: this e-mail was sent from an address that cannot accept
incoming e-mail.
To contact us about an unrelated issue, please visit the Help
section of our web site.
Best regards,
Arunraj
Amazon.com Customer Service
http://www.amazon.comDon`t know if more feedback would help to make it available to other countries but I hope so.