Every day a new word is chosen, and simply sending a tweet containing that word will enable your update to appear on the Artwiculate site. Once there, other users can vote whether your usage was "liked" or whether it was inaccurate.
To join the game, simply send a tweet with the current Word of the Day in it. To set up a profile on the site to track your progress over time and to get the new word sent to you each day, follow @artwiculate on Twitter.
Users with the most votes up on their usage earn a place in the "Hall of Fwame." As far as Twitter games go, this one is notable for its more edifying and instructional flavor. It makes good use of one of the core pillars of Twitter -- language -- and creates a fun and engaging ecosystem around it for wordsmiths.
Do you like the concept of Artwiculate? Have you played other Twitter games in general and if so, what's your favorite so far?