Find RSS Feeds Based on your Keyword Choices
Bing Search has an interesting search operator which let you find RSS or Atom feeds on a website for the keyword terms you search for.
Searching for RSS, Atom Feeds using Bing
To find the feeds containing your search terms or keywords using the
feed: operator while searching in bing. See the example below…
I was searching for paypal india to get updates.
Using this you can find useful blogs or websites related to your interest or niche. I didn’t find any similar trick for google but inurl:rss.xml, inurl:atom.xml works quite well.