Thanks for the feedback - here's the return of OpenAm!
The OpenAm service is for easy linking to books on the Amazon site (music and DVDs to come - the web services don't allow that yet). It also makes a simple address bar search tool.
Just type openam.com/ followed by the name of the book.
If it's a common name, you can add the author's name first. For example http://openam.com/stephen king/cujo.
To direct to a particular country's Amazon site add /uk, /us, /jp or /de to the end of the link.
To get commission for referrals, add your Associates ID to the end of the link.
Read more details here. Constructive criticism appreciated - particularly whether I have the artist and title the right way round, and whether links should lead to the individual item pages (ie using ref=nosim).