This is great vivek :). I know for a fact that Lynda.com is using the same thing.
And I can only recommend you to do this.
Also Plurasight.com does have some nice layout, if you need some inspiration.
I'm a member on both of thoese sites as well, and they provide great knowledge as well. But not Hard-core IT Security, as your site does! - So again, good work Vivek!