CMS Site w/ User Posting and Rating

Details in attached PDF - Read before bidding. Basic Site Concept: Users create a list name within a given category. They and other users can then add items to this list. The items can be voted up or down and are displayed in that order. I feel this is an easy implementation in Joomla or WordPress though I am open to the possibility of other CMS systems such as Pligg, etc. Considerations in choosing: portfolio, cost, time If you do not send a PM answering the questions from the PDF, do not bother bidding as your BID WILL NOT BE CHOSEN.