First of all well designed . I'd suggest have 3 boxes in a row at very top representing each site . When the user click at a site , scroll via jquery to the site ,where user see your preview ,likes,tweets etc . I don't know about the people you are targeting but i feel pretty much lost when i land on your site .
good design but it can be better if the logo of the site is within the ribbon...it would look neat and clean then