Amazon just enhanced their affiliate widgets, adding some great new features.
Widgets now have the ability to: Shuffle Products, Use Default Search Terms & Custom Tracking Ids

From the Amazon Associates Blog – The Amazon Widgets team is thrilled to announce many new features that will make your widgets even more fun and effective! Since the launch of Amazon Widgets last September, we’ve been overwhelmed by your response. Associates have created over 200,000 unique widgets which have been displayed over 800 million times!

Many of you came back with great suggestions and we’ve picked the most requested features and implemented them in this release. More…