As addition to my blog posts regarding Amazon I have extracted the respective code into a separate sample:
The code can be downloaded here: AmazonSample.zip
After downloading the solution (VS2010!), you need to open the appSettings.config file in the web project and provide your personal Amazon credentials. Afterwards F5 should be all you need.
Calls via the server use a simple cache implementation that stores the XML returned from Amazon in a local directory. This way one can have a more detailed look at the information available from Amazon. This is intended for debugging purposes and to avoid flooding Amazon during development – it is not suitable for production code!
The related blog posts are available here:
That’s all for now folks,
AJ.NET
AJ's blog 
I read ur post Aborting a service call in SL3 leads to an exception on silverlight forum (http://forums.silverlight.net/t/117647.aspx/1). can u let me know how u handled it or send me the sample code.
jkumarsahoo@gmail.com
Comment by jitendra — November 16, 2011 @ 3:33 pm