http://www.amazon.com/gp/aws/landing.html
Registration for and documentation of the Amazon e-commerce web service
http://atlas.asp.net/docs/atlas/doc/bridge/Chaining.aspx
Information on passing data from one web service to the other (in modern terms, creating a mashup)
http://atlas.asp.net/docs/atlas/doc/bridge/default.aspx
Documentation for the web service bridge, including a sample working with the MSN Search web service
http://www.google.com/apis
Registration for and documentation of the Google search web service
http://www.w3schools.com/xsl/
An XSLT tutorial including an XSL reference
Learning XSLT by Michael Fitzgerald (O'Reilly)
A great introduction to the technology