Audio & Video Streaming Ecommerce Website

We need an ecommerce website design that is multimedia and database driven with flexibility that allows growth.

It will be a website that is extensive in user profile admin, users are able to purchase different type of user accounts in order to submit/upload videos, Live broadcast their shows, and upload related items for sale.

Features include: social networking aspect, video on demand, live broadcasting, ecommerce. advertising capabilities including banner ads and video ads.

Here are a couple example sites:
http://www.stickam.com/liveStream.do?filter=popularity&friendsOnly=on&publicCamOff=on&noProfileImage=on&collapseFilters=yes
http://www.livestream.com/