I’ve been reading about Drupal and Joomla and see them referred to as a CMS. Sometimes they are also called a framework, but they don’t seem the same as other frameworks like Rails and Zend. Can someone explain the difference between the two terms? Which is correct for Drupal and Joomla?

I have extensive plans for a new niche social networking site (nothing like fb or myspace). It will require a google maps kind of interface as well as wiki’s. Also people will need to be able to upload pictures, videos, and have their own mini-blog on the site. Any suggestions for any of these components?