In the example below, IO is employed to make a cross-domain request to Yahoo! Pipes. The output of the Pipe is an RSS-style feed formatted as JSON. We pass that output to the JSON Utility's parse method for sanitization and then display the contents of the Pipe in a list.
The cross-domain approach obviates the need for a server-side proxy, making it faster. And the use of IO in place of a script node allows us to retrieve the JSON data as a string and execute JSON.parse against it, making it safer to use; a script node would evaluate immediately in the global scope as soon as it was loaded.