If you are bored by the classic way to sending messages, you are at the good place ! Now, with this amazing plugin you are going to be able to send messages like tweet.
How to use
Just send a message to another player like this :
@Player message. Example, for a player named Notch : @Notch Hey Notch, thanks for your game !
There is no permissions for the moment, in a future version maybe. I think it's not very important now.