Multiplayer games can be a lot of fun due to the competitive social dynamics involved. Playing against real people, in most cases and for most games, is inherently more rewarding than playing against some human-coded AI. Even single player games that offer up a high score list inject a bit of the multiplayer competitive element, though without the social dynamics. That's why I find myself playing single player games with high score lists more often than those without, and why I find myself continually going back to games like WEBoggle and Conqueror simply because of the dynamics involved in playing against a live human opponent. And I've just found another game to add to that list.
iSketch is an online multiplayer Shockwave game similar to the drawing game Pictionary, and it works remarkably well on the Web. You sign in with a username—no registration is required—and enter any available room, though no more than 10 can play at a time. Each round consists of 10 sketches. Players take turns drawing a word assigned by the game. When it's your turn, a basic and simple-to-use drawing interface appears with which to begin drawing. Players type their guesses in and the game recognizes when someone gets it right, which then begins a 10-second countdown for any remaining players to get it right. Your score is based on how quickly you guess the word. It's very well designed and loads of fun. This one is a keeper, and you simply must try it out!