FeedBurner is a way of publishing your blog’s feed. Simply join FeedBurner, and submit your blog’s feed to them. You will then end up with a new feed URL. FeedBurner feeds are formatted so as to be compatible with the major directories. You also get access to a variety of stats that help you analyse your traffic and subscribers, and see where they come from.
Should your feed be popular enough, you may be able to participate in the FeedBurner Ad Network, and either monetize your blog or earn extra money. FeedBurner is now a part of Google.
I have a number of RSS feeds burned using FeedBurner. The one for this blog is http://feeds.feedburner.com/EgdcLtd