From Like button to Recommend in Facebook

It might already be there on the air.

Facebook's Like button can be generalized to create some product called "Recommend".

Say, if you liked apple, orange and banana, you may also like mango... How about strawberry?

Similarly, if you liked a blog post or article tagged as "politics", then you may also like another post with the "world news" tag in it.
Something like that.

I know that Amazon already has it. I am not sure if Facebook has it.

One could also scan the user's cache to recommend the items from their history. Sounds intrusive? Well, did not you (already) give up the idea of anonymity by Liking it??  If you liked google's adsense, you will (also) probably like this idea.