There are currently no widgets assigned to the right-sidebar, place some!
Once you add widgets to this sidebar, this default information will go away.
This theme also uses the WordPress 3.0 Menu system. You probably see the default stuff you have in the menubar. Go to Appearance -> Menu in the
wp-admin (dashboard) and create a new menu.
I have the slight feeling that most people do not really like Slate Security.
Slate Security: “Warrior women are just falling from the sky!!”