A good poster oughta make you want to see the play. The Deaf West Theatre production of Big River, which played the Fox last April, sported a knockout poster on which the clouds hovering over Huck Finn and Jim on their raft were actually wispy fingers signing in ASL. But the year's most effective poster was the one that heralded the fledgling Kevin Kline Awards. Built around a sober Kline photo by Annie Liebovitz (who granted free use of the image), the poster simply lists the area productions that are being judged in any given month. All participating theaters display the poster in their lobbies. All over town theatergoers can be seen perusing that poster and talking about other plays. The inaugural winners are yet to be announced, but thanks to this poster, the Kevin Kline Awards are doing their job.