The site defines itself as a social networking site for IT professionals. As the page finished loading - even before I read the article this ->
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The favicon is displayed in the address bar on all browsers and in the tabs on browsers that support tabbed browsing. It identifies who you are and is associated with your brand.
Your favicon should be unique and, if possible, reflect your business name, product or service. It acts as a visual link between the page being displayed and your brand.
While small in size, only 16x16 pixels, the favicon is one of the many small things you can do to brand your site.
See my article on online branding for more information.