How To Activate Custom Profiles In Blogs MU Theme?

Hello All,

Maybe I am being dense here, but what is the procedure to access the following features of the Blogs MU theme. It is active on WP 3.4.2 multisite. No Buddypress.

"The theme features a stack of extra new features such as allowing members to customize their own profile page by adding video, Flickr, profile headers, profile blog feeds and integrating their own social network feeds such as twitter, Facebook, MySpace among others."