Get images from Amazon using the Advertising API.
You will need an account with Amazon for their Product Advertising API. When you register and login you will have a public and secret key. You'll need to enter these on the Amazon Images plugin options page to be able to get image information.
You will also need an affiliate tag, although if you're looking at this plugin you likely already have one of these.
The user agreement for the Amazon API allows you to store images for up to 24 hours. So rather than storing the images on your server this plugin links directly to the image at Amazon.
During the import the images are temporarily downloaded so that WordPress can work with the actual file to get size information. But the images are deleted immediately afterwards so they're not on your server for more than a few seconds.
The links are retrieved using the Advertising API, so presumably you are using the images to link to content on Amazon and maybe including your affiliate tag with the link.
Currently the plugin pulls images from the US Amazon site. It should work outside the US, but living in the US I have no good way to test that.
Your host probably doesn't have the SOAP library for PHP installed on your server. Ask them about it.
Visit [http://www.nutt.net/tag/amazon-images/](my site) or use the WordPress forum link to the right if you need help.