"Snowl is an experiment to answer that question. It’s a prototype Firefox extension that integrates messaging into the browser based on a few key ideas:
1. It doesn’t matter where messages originate. They’re alike, whether they come from traditional email servers, RSS/Atom feeds, web discussion forums, social networks, or other sources.
2. Some messages are more important than others, and the best interface for actively reading important messages is different from the best one for casually browsing unimportant ones.
3. A search-based interface for message retrieval is more powerful and easier to use than one that makes you organize your messages first to find them later.
4. Browser functionality for navigating web content, like tabs, bookmarks, and history, also works well for navigating messages."
2 links here
