Wordpress Project - Create Ability for Vendors to Log in, Add, and Edit their own pages

Our client has a highly customized Wordpress-based site and would like to make two enhancements. This site acts as a database of local party vendors. Each vendor has his own page with the following information: * The vendor name * Logo * Text about the vendor * Link to vendor's external website Currently, this page is VERY boring. We would like the ability to add more photos. We welcome your ideas for more ideas for ways to enhance the page. We can provide a mockup if necessary. Right now this page is generated by information entered on the back end of the Wordpress site. We would like for each vendor to be able to create an account, log in and fill in their information like event type, availability, other details, phone numbers, address, who to contact year founder etc. They can upload 2 - 4 pictures. And it automatically goes into the center section already formatted. We understand that this may not be possible to do in Wordpress and are open to the idea of moving to another CMS such as Joomla. We would also like to add some social networking functionality: the ability to email a friend, bookmark vendor, print the page, share it on Twitter/Facebook, and request information. We will provide the URL and login details to qualified bidders. We will NOT be starting this project immediately but we will extend the deadline as necessary to allow for a 30-day period to complete the project. 30 days is our estimate for the project deadline, but we can adjust it if you feel you need more or less time to complete it. This is a third-party project and we are your client. You may not communicate with our client or use this work in advertising or a portfolio of any kind.