I know that joomla, drupal, b2 and wp offer a multiple blog CMS but what I wanted to know is which one is best. What I want to do is create a site/blog www. mysite.com and then create subdomains sport.mysite.com with different blogs. The main idea would be to have a site that users could navigate as one without the need to create a bridge between different blogs. In simpler terms it would be a site comprised of many blogs.
Did you ever tried Movable Type? (I can't post the URL since the board doesn't allow me to post live links) IMHO is the best pro blogging platform.
drupal can do subdomains based on one code base. each subdomain can have its own sql database and theme