Search4RSS is a search engine designed specifically for RSS feeds, of course. The search engine works with your existing Yahoo id’s.
Here’s how it works: first select an engine from the drop down menu; you can choose from, among others, Google, YouTube, Delicious, Flickr, and Technorati. After you select your preferred engine, enter in your keyword or query. Your results are presented alongside suggestions for related tags. The site has over 150,000 feeds which are sorted by category. Anyone can provide feed submissions. The site is best used with Mozilla. Feedback is welcome.
Search4RSS.com In Their Own Words
“Search4RSS started 2 years back as a regular RSS Search engine website and now we are giving our domain a new direction. With so many Web 2.0 application evolving around the web we decided to give ourselves a try to create a Web 2.0 application which would consolidate your search and data from various domains like Yahoo Web Search, Technocrati Blog search, Google Videos, Delicious bookmarks and more…”
Why Search4RSS.com It Might Be A Killer
Search4RSS provides quick and simple RSS searches. It’s a non-brainer to use.
Some Questions About Search4RSS.com
How will Search4RSS advertise? As RSS isn’t yet mainstream, will the search engine have difficulty finding users? 
