I've put some articles on my blog showing how to send visitors to the correct Amazon based on their IP address Determining location: http://blog.dantup.me.uk/2007/08/blogger-serving-ads-based-on-users.html Creating your own context-sensetive ad link system: http://blog.dantup.me.uk/2007/08/blogging-creating-better-ad-system-with_9334.html Feel free to post any comments on the blog and I'll do my best to respond