No affiliate link here, just Google wp-simplicity. This amazing plugin will insert Amazon, eBay and Clickbank products, it will even generate the post if you need it to. Here's one of my blogs in the early stages.
http://totsandteens.biz, I even have the famous Amazon orange.
What more do you need. I think it only works for the USA at the moment, but they are working on the UK. Let's face it, there's a lot of money to be made as an Amazon affiliate.