Google Feed API

With the Feed API, you can download any public Atom, RSS, or Media RSS feed using only JavaScript, so you can easily mash up feeds with your content and other APIs like the Google Maps API.

The Google Feed API takes the pain out of developing mashups in JavaScript because you can now mash up feeds using only a few lines of JavaScript, rather than dealing with complex server-side proxies. This makes it easy to quickly integrate feeds on your website.

The Feed API supports Firefox 1.5+, IE6+, Safari, Opera 9+, and Chrome.


More information: http://code.google.com/apis/feed/