custom ads format - how they do that

hey when I do blogwalk I've found this interesting blog with unique ads format <www.labnol.org> I wonder how they do that?
here is screenshoot of the ads format:

please somebody help me!!

 

I've noticed Mainstream sites like G4TV with custom google ads too. Not sure what the deal is.

 

Google allows big publishers (i.e., making a lot of money from adsense) to modify the standard look of their ads.