You could have downloaded MulleNewz 1.9 for Mac from our application library for free. The application lies within Internet & Network Tools, more precisely Browsers.
From the developer:
MulleNewz is a dockling which allows you to stay in touch with the world via the OSX dock! It is an easy to configure RSS reader which means that it can access a lot of popular sites that offer RSS content - at once! Just click on the headline you're interested in and MulleNewz will open your preferred browser and direct it to the URL containing the whole story.
MacUpdate's Mac OS X new releases RSS feed is at:
http://www.macupdate.