A few highlights of Feedburner:
- The Feedburner PingShot automatically notifies a bunch of web directories when you post new content.
- Feedburner lets you easily setup email subscription lists.
- Gives you serveral different chicklets to put on your site to make it easier for people to sign up for your feed.
- Allows you to automatically add links to social bookmarking sites (e.g. Digg, del.icio.us, Slashdot, Furl, Spurl, etc.) on each blog post and also in your FeedBurner feed. By using these links you can have your readers promote your blog for you. This is a very powerful tool for you to use as you grow your blog.
All in all, Feedburner is an awesome and free tool. Definitely worth checking out.