From Superdit.com there's a tutorial showing you how to display search results in an ExtJS grid as pulled from Google's API. The article's from the beginning of the year, but it's a good self-contained example of using ExtJS to automatically pull in data produced from the backend.
This time I want to make a simple example in displaying google web search result in ExtJS grid, other ExtJS component that can be used to displaying this result is dataview, but grid is more common in displaying data in ExtJS.
The code (downloadable here) is pretty simple and the full CSS, Javascript, PHP and markup you'll need are included. The PHP pulls the results from the Google API and
JSON encodes them for loading into the ExtJS grid. You can see the end result here or try out a demo.