I can’t remember how I found the Rollyo Search tool today , but it snapped up my attention in flash. Not only can you create your own searches, lots of them, and then share or post them on your site, but you can also add them as search extentions to FireFox.
Couple of Examples in action
Granted not sure of it’s direct use in affiliate marketing yet, but it’s pretty neat, and I had to force myself away from the site before I got carried away creating more and more personal and topical searches! Wicked Good!