Recently I have been reading about YQL. YQL is a great idea that came out of Yahoo! and is an awesome tool for developers. Basically YQL allows you to fetch information from the web using SQL like syntax. Yahoo! provides a good number of open data tables and many more are contributed by the open source community. Check out the community page at http://datatables.org.
I was just playing around with the stuff and built a small example application as a YQL demo. This app fetches movie information from IMDB. I used the open data table created by CerealBoy. The way it works is it scrapes the HTML from IMDB and extracts the needed information. In this example, YQL acts as a proxy and easily solves the cross-domain AJAX problem.
Checkout the demo here: http://odhyan.com/yql/movies/