yes! It's called Inklink. It's on shockwave and its basically like online Pictionary. It's extremely addictive, and even more extremely fun!! Go play it, you'll love it, I guarantee! Here's the site, you don't have to be registered or anything to play, just have shockwave: Inklink
It's not exactly a game but the Jabberwacky chatbot is a very good way to pass a couple of hours. Even if it does have a tendency to profess it's love for people...