It's a vote to decide which voice actor will say what line during the One Piece Award opening ceremony.
Basically, click on the character, type in a quote from the manga (anime original lines too? i dunno) and 1 of the top 5 votes will be spoken live during the event.
By voting, you're also eligible to win a ticket for the event itself.
Voted for Robin!! :D
Also, I am kinda anxious to see this Enies Lobby special, just to see if they can make it more epic then the "Tv show" version.