from kottke.org: Amazon web services via SOAP or XML over HTTP. Couple examples here. This site is lightning fast (ASP retrieving XML via ResponseXML object).

[update 07/19/2002: you can/could create a dynamic bookstore based on your own content using a tool like this. ie: user is on the “mexican food’ page, we show mexican food cookbooks from amazon, kinda cool] — My first use of this could be a cool cookbook lookup tool in karensrecipes.com. Just gotta finish the re-write.