Now something that escaped me up until recently was the fact that once you have a webstore running through Amazon Affiliates and Associate-o-matic you can build slight variations of them for Amazon in other regions of the world. For example I setup www.ipods-andgadgets.co.uk for the UK Amazon site and have now expanded to the USA with www.ipods-andgadgets.com and www.ipods-andgadgets.com/ca for Canada. Very little extra work, the cost of an extra domain name but it could increase your revenue significantly.