Amazon just launched a new feature for its Associates. Product previews lets you open a small informational window when your visitor is hovering your product link. It works well enough and is easy to incorporate, with nifty little guide-like things added to your Associates page.
Thord Daniel Hedengren is a designer, writer, and blogger, and also the former editor of The Blog Herald. He used to be a hotshot in the gaming industry in Sweden, but sold everything and went International. Most recently he wrote a book called Smashing WordPress: Beyond the Blog, and does loads of kickass design.