Suffice to say, I like YQL a lot – it is the command line interface to the web (and a text version of Yahoo Pipes). Go and play with it yourself:
As explained in the Ajaxian article, all the non-authentication web services can be accessed through a public REST API. Simply add your YQL statement to
http://query.yahooapis.com/v1/public/yql?q= and add a format=json parameter and a callback parameter with the name of your callback function and you are set.
YQL allows you to access any freely available data service and even scrape HTML, how cool is that?