Is this a wordpress site/theme

Since it’s sort of facebook color scheme and layout. There’s two facebook look-alike themes that you can take a look.

http://justintadlock.com/archives/2007/09/22/facebooked-wordpress-theme

http://foxinni.com/my-themes/facebook-layouts-wordpress-theme/

Generally, if you do a right-click, view source, and look at the path to the CSS stylesheet, you’ll see something about “wp-content” in the path of it’s a WordPress theme.