Looks like a web version of Safari's Top Site. Except Top Site is a grid. You can place favs in to a particular square, but recent websites you visit a lot will

Looks like a web version of Safari's Top Site. Except Top Site is a grid. You can place favs in to a particular square, but recent websites you visit a lot will show up automatically on available squares. Hmm, actually a social version of this might be very interesting. Based on your fav sites, other popular fav sites will be recommended to you.