One thing you might try is to set up a simple blog at http://www.blogger.com/home and make a few posts about what you have. Then go to Feedburner.com and enter the URL of your blog and let them generate a feed for your site and go thru all of their steps and they will show you how to announce to everyone each time you make a post (it's called pinging).

I use this method with my blog located at http://homebusinessnow.blogspot.com