522938 auction site

This is a re-do of tweetyourdomain.com. I want an automated auction site with full integration into Twitter and Facebook. The auction will sell domain names and websites. The user will sign up and once they pay for their listing, it will automatically be sent out as a Twitter/Facebook post to the tydomain twitter account and the Facebook page. Then as events occur (bids, traffic, time milestones, etc.) other automated posts will go out to Twitter/Facebook. The user will also have the ability to promote their listing to their own Twitter and Facebook network with the touch of a button from their user account. I want [login to view URL] to also be integrated into the site somehow where people can register their new domains.