The Associates Program allows you place links for Amazon products on your site. As an associate you can earn up to 10% of the revenue generated from your referrals. The percentage you earn is dependant on whether or not you are on the Performance Fee Structure or the Classic Fee Structure with the Performance Fee Structure with a referral rate of 4% to 10%. There have been some recent developments to their program which include Amazon MP3 and Context Links. 
Amazon MP3 offers the largest selection of DRM free MP3 downloads which means they can be played on any device. This is something that is sure to go down well with a lot of consumers. I see them giving iTunes a run for their money. Most of the songs are priced from 89 cents to 99 cents. Up until 31 December 2007 Associates are eligible to earn 20% on all MP3 referrals. From 1 January 2008 the referral fees will be 10%. (Note: Amazon MP3 is currently only available to US customers)
Context Links Beta identifies and automatically links relevant phrases within your content to Amazon products.
Payments are sent out monthly with Amazon offering three payment options:
1. Amazon.com gift certificate/card ($10.00 minimum earnings)
2. Direct deposit ($10.00 minimum earnings)
3. Cheque ($100.00 minimum earnings. Note a $15 processing fee will be applied to all Associates with US addresses when choosing this option.)
A number of sites out there are already displaying Associate links. If you have not yet signed up it might be worth a try.
How successful do you think an affiliate can really be with Amazon? I put up an Amazon store on my 7 year old son’s lego review site ( http://www.legoadventures.com ) as he wanted to start a business.
I’m wondering if I should be putting other profit centers on the site for him. I’m just not sure what else to do besides that and adsense.
lego kid,
thanks for stopping by. I posted a reply on one of your posts.