I think RSS Feeds are very useful. An example of a unique way to get your message to your customers is by using RSS feeds in toolbars. One company doing this is Effective Brand (
http://www.effectivebrand.com). They allow anyone to create their own toolbar for their visitors. I quickly built a toolbar to show how this could be done. I put the link in my sig (
http://bittorrent.ourtoolbar.com). This toolbar pulls information from several different torrent tracker sites. Very useful for the users but also allows the opportunity to develop customer loyalty.
Just my 2 cents.