Using the Amazon API and ASP.NET I have created some sidebar panels to let people search either Amazon.com, .co.uk or .de from the sidebar panel of either Mozilla or Opera web browsers.
The sidebar shows the results, max. 10 per page, and lets you move backwards and forwards within the results; all without leaving the sidebar. When you click on the title of a product it displays the full Amazon product page in the main browser window. Thus using the sidebar like this gives a new navigation interface to Amazon websites.
To install the sidebars goto edazzle dot net, the page includes a couple of screenshots as well.