I moved my “IM STIG” license plates over to my Dodge Viper so I had to get new plates for my Ford Mustang. What to get on my plates this time around seemed like an obvious choice! 
UPDATE: It looks like I’m the fifth sixth person to get WordPress license plates! Ryan Duff (Pennsylvania), Jonathan Dingman (California), Michael Torbert (North Carolina), AJ Morris (Michigan), and Jesse Friedman (Rhode Island) also have them. Awesome. 
S-W-E-E-T
I think that mine was posted before everyone else listed here
(Feb 4, 2010):
http://twitpic.com/1169jv
In Moldova you can only set 2 letters as custom license plate… so it’s just WP