The people from 20q.net manufactured a great physical device for playing the game. Sold for about $15 at Walmart, makes an exceptional gift for hard to shop for people. On eBay for $12 shipped... http://cgi.ebay.com/20-Q-Game-I-can-read-your-mind_W0QQitemZ...

just tried 20q.net and i can say it does make a lot better guesses and it is also not categorised.