How do i rate the theme and keep updated ?

If you want to rate the theme, and be notified about new updates of Eleven Wordpress Theme see attached screenshot. You can rate the theme by clicking on the stars on the right side (the higher the better :-) ), and Check - get notified by email check box to keep updated. 

Also check video. 

http://www.youtube.com/watch?v=MmUPDiDOpNY