I have WordPress installed on one of my websites. On the blog, I edited it to include a listing of RSS buttons that I got from a site that creates RSS buttons. These buttons are so people that have Yahoo!, people that have Google, My MSN, My AOL, etc can subscribe to your blog. The button maker is located here: http://www.toprankblog.com/tools/rss-buttons/
I don't see how to it, though, with the free WP blog. On my blog that I downloaded and installed, I just went to Presentation > Theme Editor and added the coding the site gave me to the r_sidebar.php file. I was thinking of using Widgets, but not sure if that would work.