title: Amazon Advanced FPS programming tutorial
body: <p>I'm struggling to find any good library for Amazon FPS for Ruby language, and so
  I'm looking for a suggestion on a good explanation (other than amazon docs) or perhaps a tutorial to get me up to speed quickly with Amazon FPS.</p>
  
  <p>What I am looking for is information on how to set up user registration form and do recurring payments which vary in amount charged to the user.</p>
  
  <p>I've already wasted 4 hours going through amazon docs and received a lot of errors when sticking to their information, and the only result I got is getting hungry.</p>
  
  <p>As a side note, I've set up sandbox business account and Amazon keeps notifying me that I did not set up sandbox business account.</p>
  
  <p>Could someone possibly please redirect me to some insightful resources on using Amazon FPS but different than <em>crappy</em> sample FPS apps, and twisted amazon documentation ?</p>