Shadi,

Just need a little clarification on what you are asking about.  The News Feeds (RSS) module is a standard DNN Core module and is available for use on your web site.  There may be some configuration issues to overcome due to a variety of install/host issues and code access security setup. There is also an issue identfied with using the module in conjunction with Tam's Active Directory setup for local intranet usage. 

The module can use local news feeds generated by other Core modules when the syndication flag is set, which allows news items to be generated into a rss feed, which can be used as a news feed source. 

Is that what you needed to know?

The DNN application contains most of the elements I see displayed on the WebWizGuide.com site.  Most of the DNN Core modules allow syndication, which creates a entry available in the cached xml doc used for the sites' rss news feeds.  These feeds can be displayed on your site, or a user can subscribe to your site's news.  So, really, there's no need to simulate what was done on that site, as it's done with the Core DNN modules.  Take a look at some of the reference sites, and even this DNN site to get an idea of what is possible.

So, I'd say DNN should give you what you need, including a way for visitors to subscribe to your site's news, which I don't see available on the WebWizGuide Site, anyway.