Yahoo Pipes, the Yahoo’s new mashup making tool is impressed me by it’s capabilities like interactive feed aggregating and manupulation. It’s a nice tool which is in its beta stage that can use to create amazing RSS feed related mashups in a interactive manner.
Using this nice tool you can mix feeds and other data in a structured, algorithmic and hierachical way in a visual manner.

Here are some useful links:
Here franticindustries explained 5 cool ways to use Yahoo Pipes.
YahooTunes example by Nick Bradbury.
Lifehacker: Create your master feed with Yahoo! Pipes













