Shit, I use this for image search. Basically we let users submit the title of items they own (for everydaycarry.com), we do a google image search for that title and display back the top 5 results from googles image search to the user, letting them click on the appropriate product. We then link that product to the google image source URL.
Anyone know of a alternative product that would let this keep happening? When we implemented this originally, I did not find any competing options from either Microsoft, Amazon or Yahoo- That was 2 years ago though, so things may have changed for image search API's.