Amazon just added a new method to its XML API called
TextStreamSearch. This method lets you send an arbitrary bit of text to Amazon, they analyze it for keywords, and then make product recommendations based on that text. This would let you send, say, an entire weblog post and get product recommendations based on that text. I think it could be useful for creating very targeted advertising based on a page's contents. (Sort of like I'm doing on my
quotes page.) You could also monitor IM conversations and pop-up product recommendations based on what people are talking about. I haven't tried it yet, and it'll be interesting to see how accurate it is.
[via AWS newsletter]
Update: I created a page to test the Text Stream search. You can
try it yourself. (There seems to be a limit on the number of characters, but I haven't narrowed it down to exact numbers yet.)