Feed Search Engines/ Directories:

These are sites that act like a big directory of links to various Blogs and RSS feeds. Your best bet is to type in the keyword that best describes the niche you are targeting and finding the suitable feeds.

• Syndic8.com - This site is one of the oldest players on the RSS turf. Synic8 provides both a search feature and a DMOZ style feed directory, where you can browse for feeds by subject.
• Technorati - Search engine for more than 2,329,243 blogs.
• Feedster - Another terrific feed engine offering an entirely different selection of feed search results. Perform a search and click the rss link on the on the results page.
• About.com - About.com recently went to the "blog" format for their category editors. The main pages for many topics now have RSS feeds available for you to use, providing a good source of content for many subjects.
• BlogDigger - Yet another powerful feed search engine. 
• Blogdex- BlogDex offers another feed search.
• BlogSearchEngine - The name says it all ;)
• DayPop - An awesome search engine that searches for blogs, news and headlines based on your keywords. Simply do a search, and on the search results page, click the XML icon.
• Moreover Another  RSS Search engine which even provides code that will enable you to add the search engine on your own server.
• Blawgs.Detod.com - Another blog/feed search engine. Not so comprehensive
• 2RSS- this is a directory of feeds that has a collection of over 5000 feeds sorted by split level categories.
• News4Sites.com - is a directory of feeds which has 119 categories
• NewsIsFree.com - Quite a comprehensive site but their servers are mostly overloaded, so if possible give this one a miss.
• BlogPulse - a new tool from Intelliseek for tracking and comparing issues, phrases, personalities and topics in the rapidly exploding universe of blogs. It applies machine-learning and natural-language processing techniques to discover trends in ocean of information generated by blogs and RSS feeds
• Blogenstein - Catalog of 242 blogrolls

Individual Feeds:
These are sites that offer content from their sites.

• Userland's Top 100 Most-Subscribed-To RSS Feeds - Userland offers their Top 100 most subscribed to feeds.
• Userland's Most Recently Updated Blogs - Here's another offering from Radio Userland to check for fresh, syndicated content.
• Yahoo Groups - Browse through the Groups, and when you find one you want to syndicate, just add /messages?rss=10 at the end of the URL. 10 indicates the number of items are to be displayed.
• PRWeb - Well know site that lets you create free press releases. The also allow you to syndicate the Press releases and provide these in a directory format
• LiveJournal - Is an online blog host, claiming to host more than 500,000 blogs,To find blogs of interest, use this LiveJournal "Interests Seach". Once you find a blog you want to syndicate, just add /rss after the URL, to generate an RSS feed.
• NetWork54 - Here's an online forum provider which you might know from the many Internet marketing forums that are hosted there. Simply browse the directory, and when you find a forum you want to syndicate, take the URL of the forum, and add ;xml-rss to the end.
   
  For example, the URL:network54.com/Hide/Forum/12345 Becomes:network54.com/Hide/Forum/12345;xml=rss
• Eyeonsales - RSS feeds for every possible sales topic
   
   

 

News Feeds

These are sites that offer news that's updated on a regular basis. It may regional news or industry specific news etc
 

• Yahoo News RSS Feeds - Yahoo provides some syndicated news feeds.
• Yahoo Beta News Search - There's no search box, but clicking the link takes you to an XML/RSS page. Just change: your+keywords to the end of the URL in your browser window to create an XML/RSS feed page.
• CNET - CNet provides many of its articles and news headlines via an RSS feed.
• Reuters-  The big daddy of news agencies recently started proving its news updates via RSS
   

Other RSS Resources

•  Blogless Blog - A GPL PHP script lets you publish your own RSS feed using plain old html. If you have a decent understanding of html, you can easily generate your own feed for syndication using any html page.
• Google News2RSS from VoidStar - A nifty little PHP script used to "scrape" headlines from Google News and converts them into RSS feeds, based on your keywords. It's recommended that you download the script and install it on your own site, however you can use the script hosted on Voidstar, as well.
• eBay2RSS Feed Converter - Convert searches for eBay auctions into RSS feeds, or select from pre-configured RSS feeds on a variety of topics.