Yahoo! Pipes – RSS Mashups
Recently yahoo released new tool called pipes.yahoo.com. This is a JavaScript based tool which lets you create RSS mashups through web-based visual interface. You can combine different RSS feeds and use the output of that combination in your web application. You can also apply customized filters to the data mashup. The site has some cool examples which will help user building their own pipes!
Here is the video created by Yahoo! Engineers demonstrating how to build pipes.