Go to Kindle Publishing for Blogs.
Click on Create a new account.
Follow the directions to set up a vendor account by entering some basic. Enter your name, email, and password. Then select and enter answers for three security questions. Then click Create Account.
You’re now on the Kindle Publishing for Blogs Dashboard. Under Your Account in the upper right navbar, select Account Information. Enter your address, business information, tax number (or social security numbers), and phone number. (Use 1 for the US country code and make sure you only use numbers, no dashes or dots in the phone number. Who knew entering a phone number could be so complicated?)
Next, you’ll enter payment information. This is so they can pay you, not the other way around! (Note that there is no fee for electronic deposit, but an $8 to have them cut you a check and mail it.)
Click on Save Changes.
Click on Your Blogs in the upper right navbar.
Click the + Add Blog link on the right side, just above the welcome box.
Enter the RSS feed URL for your blog in the RSS/Atom Feed Address field. Click on Validate Feed and wait for the confirmation under the field. Fill out the rest of the form. Read the Terms and Conditions and then click on the check box (assuming that you agree, of course).
Click on Publish Blog to Kindle. (I had to click on Save and then recheck the box before this button was available.)
Your blog will become available in 48–72 hours. Start your engines!
The two blogs I registered at Amazon have been published. You can see the finished results here: