You can also buy Amazon.co.uk gift cards to purchase ebooks at your newly set-up Amazon.co.uk account:
1. Create a new Amazon.co.uk account, like Apache says, you need a uk address and can use a hotel. Use a different email address than your U.S. Amazon.com account. Then sign out of Amazon.co.uk.
2. Then use your U.S. Amazon.com account’s email and password to log into Amazon.co.uk, and buy an Amazon.co.uk gift card in the denomination you want (with whatever credit card you use in your U.S. Amazon.com account)
3. Gift that Amazon.co.uk gift card to the email you used to set up the Amazon.co.uk account in Step 1
4. Now you can purchase ebooks at Amazon.co.uk with that gift card in the Amazon.co.uk account you set up in Step 1
5. Repeat as needed
-->I think I got this info. somewhere on a Mobileread thread, and it worked fine.