This is a very handy tool for grabbing a single feed and placing it on a web page; it could be very useful for libraries that do not have an abundance of technical expertise but have a blog they want to include elsewhere on the site.
One part of Google’s interface confused me (odd, as Google is usually so clever at interfaces). When entering a “Feed Expression”, Google will not take an RSS feed’s URL. It expects you to type keywords describing your feed, and it will figure out the actual feed URL. So entering my feed’s URL (http://www.rss4lib.com/index.xml) did nothing; entering simply “RSS4Lib” produced the feed.
Visit the full text of this entry to see what the code looks like embedded in a web page: Google Has an RSS Embedding Tool.