This is the design chosen by AdDogs.com for their new front page user interface. As of this writing, it is not yet implemented as AdDogs.com is still in development. Large version here.
This front end will likely be put on an existing CMS which will have the AdDogs proprietary application integrated. One of the CMS solutions being considered is Joomla, which is quite robust.
The actual AdDogs web application will riside in a template that should look similar to this: