Finding RSS feeds isn't always as easy as it should be, and it's even harder if you're trying to stick to a single topic. Instant RSS Search is a tool that helps you find feeds of just the content you're looking for.
With Instant RSS Search, you can search for blogs, podcasts, news and more. Just type in what you're looking for and the web app shows you all the feeds out there that match your search criteria.
Better still, you can set it up to search for more specific things, such as Google accounts on Twitter, or just feeds that have articles on a specific person on a specific site. If you're looking to expand your RSS feeds now that you've moved into a new service after Google Reader's demise, then Instant RSS Search is a good place to start.
Instant RSS Search [via Digital Inspiration]