"Click here to publicly +1 this"

[Troy711]

WTF? New site feature? (Found next to the thread heading at the top of each page inside the thread)

 

[yZoH]

Linked with Google+

 

[Hangman]

Been there for a while

 

[azkwazere]

Have you done a google search recently? its all over the links there too.
Its part of google+ (New Facetwitter)

aZk.

 

[Troy711]

First time I've ever noticed it.

 

[Turd Ferguson]

Google+ is still only in beta testing but it will likely do to facebook what facebook did to myspace.