Bitly, the link-shortening service, has something small and good for you to play with. They call it Bitly for Feelings, and it adds a clever new capability to social media.

As you can see in the image above, when you'd like to post a link to a webpage, you pick a feeling and Bitly shortens the link on the basis of that choice: Choose Love and the service generates the link Choose Hate and it spits out Both links go to the same page, but they give the links different spins. 

As with other bitly products, it works through a browser bookmarklet. It's simple and easy. And as tech writer Tim Carmody astutely noted, "Branding/commentary in the link for you + sentiment analysis for them." 

Right now web analytics companies have to guess why you posted a link to something. Did you love it or hate it? With Bitly for Feelings, the guesswork is gone. You're telling the machine: I loved this. Of course, it could be a fake-love or fake-hate link and machines are bad at irony, but the data's probably better than nothing.