Google+ has a very clean and elegant interface. It uses only 3 colors in its design but looks great. If you are a fan of Google+ design then there is a good new for you. AgentLap releasing PlusOne WordPress theme for free.
PlusOne is a WordPress theme that looks exactly like Google+ interface.
Using PlusOne WordPress Theme: To show the thumbnails on the theme, download and install get the image plugin, and set the default thumbnail size in WordPress to 100px by 100px. You can do this in media settings (Settings > Media).