From abursey's Eightlinks:

My ultimate vision for RSSlet is a service that allows users to generate dynamic RSS feeds that actually do something functional from any web page.

They now handle:

• pages generated dynamically from the contents of a form (or other source of parameters passed into a page via GET or POST)
• password protected data sources
• keyword based filtering

Coming:

• online creation and editing of RSSlets
• simple user accounts so I can track who makes what RSSlet
• security so the only the creator of the RSSlet can edit it
• ability to mark a RSSlet as private or shared
• passwords support for a RSSlet

Prototypes:

FedEx*, Eightlinks Refers, Google News - Top Stories - Keyword Match*, Exploding Dog comics, Talking Points Memo, Ain't It Cool News. *Change an url parameter to customize results.

Moreover has been doing this for years as a content provider. But RSSlets turns this idea around. It lets content consumers ask questions and get back RSS, RSS they can use. Can't you see these features built into your news reader? 

Brought to my attention by Rajesh Jain's always exciting emergic.org.

[a klog apart]