Google Reader now lets you search the content of the web feeds you subscribe to.

More and more web users are discovering the advantage of RSS web feeds. Many professionals have stopped visiting their favorite web sites on a regular basis. Instead they add the RSS or Atom feeds of these sites to their RSS reader, being that a separate program or an online service.

In practice this means that they can read all or parts of the latest articles and blog posts within that reader.

Google Reader is definitely one of the most popular online services in this arena. Google has now added a search engine to this service. As the Official Google Blog puts it:

“Search lets you use keywords to find items in your subscriptions (if you’re looking to search all blogs, give Blog Search a try). If you subscribe to someone’s shared items, it’ll search those too.”

This means that the search engine will search through the content of the various RSS files. Note that some blogs and sites will include all of their content in their feeds, others only parts of it, which will — of course — also affect the search engines ability to pinpoint relevant posts.

The search form has a pull down menu that lets you restrict your search to specific folders, sites/blogs, starred items or shared (i.e. public) items.

See also: Google Operating System
Top 5 RSS Readers (Pandia)