In the past we have seen several popular websites or services being cloned and converted into WordPress themes, some of which include the Gmail WordPress theme, Google search WordPress theme and a Google chrome WordPress theme.
Digg WordPress Theme
Digg-Like is a perfect clone of Digg, if anyone from Digg lands on your blog, they will definitely be looking for the Digg button to vote :-)
Twitter WordPress Theme
Fresh Tweet is a theme that has very close resemblance to twitter, if you are a twitter fan and want to show it off on your blog, here is a theme for you.
P2 is another theme that closely resembles twitter. P2 also has a lot of features that allow for group blogging.
Facebook WordPress Theme
Facebook lovers have quite a lot of options to integrate the look and feel into their WordPress blogs in the form of Facebook Layouts and Facebook Lover.
Which social networking are you a fan of? Will you use the themes on your blog? It would be interesting to know that.
Do you know of any other themes that are clones of social networking sites? Do feel free to share them with us.