How to search Feeds?

I want to create an iPhone project which search feeds, like in google reader if we search for some word in "Add a subsciption" tab it will display a开发者_StackOverflow中文版ll feeds related to that so we can add feeds easily. Any Idea how it can be done.

Thanks in advance,

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Google Reader, presumably, relies on Google's own vast collection of known feeds and its search engine to locate relevant ones. My guess is you'd probably need to do the same (maybe use their FeedBurner API) unless you plan to create and maintain a service to collect, categorize, and offer up feeds to searches.

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I have used http://code.google.com/apis/ajaxfeeds/documentation/reference.html#findFeeds And it worked for me.