A while ago I wanted to make a service that could take an RSS feed, apply some filters and give me a new feed. It’s a good thing I didn’t because Yahoo has done it so much better than I ever could have done! Yahoo Pipes is a beautiful example of interactive HTML (very Web 2.0) and a fantastic service.
Specify your data sources (CSV files, feeds (it can even auto-discover feeds), pages, Flicker, etc), mix them, filter them, loop them, RegEx them, you name it, and output it all in a nice, neat feed.
Drag boxes on to the page, drag to connect them and fill in the blanks. It’s really easy to use!
A beautiful piece of software… There’s tons of other stuff you can do with it so check out their blog for hints and features.
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.