"Lucid is a free, open source web desktop, or webOS that lets you:
Access your media, office documents, and other files anywhere
Stay up to date with Twitter, RSS feeds, and what's happening on the web
Create great web applications in ridiculously short amounts of time"
allows you to send instant messages to an RSS feed.
Sabifoo makes it easier than ever to publish to the web. By combining instant messaging with RSS (Really Simple Syndication), a whole new publishing infrastructure has been born. Now publishing to the world is as simple as sending a message. There is no new account to create. There are no new passwords to remember. Sabifoo uses the instant messaging account you already have - transparently. AOL Instant Messenger, Jabber, MSN Messenger, and Yahoo Messenger are all compatible right now.
This service analyzes the content of web pages and RSS feeds and sends alerts if there are any differences. The wide range of options allows users to configure their watch-filters in an appropriate way to track only desired information. A detailed reporting system keeps information from every check and gives real-time picture for every change on the monitored resource. The service is free of charge and can be used without installing any software.
Have you ever wanted to view an RSS or ATOM feed in a web based feed reader such as Google Reader or Bloglines, but could not because the feed required user authentication or used an invalid SSL certificate?
Cadmus is a real-time service that manages your stream (Twitter, FriendFeed and RSS) by displaying the most relevant content since the last time you checked in. It helps you get caught up on what you have missed.