awful writes: "Two composers in Australia have copyrighted over 100,000,000,000 phone tone dialing sequences. They state in the article that they are lampooning copyright laws that protect big business rather than artists. Their website has more info and explains how they did it. You can check your number and make sure it hasn't been copyrighted by these guys. They have already recieved one offer of money - from a guy who wanted to purchase the copyright to his number so he could stop direct marketing firms from calling him." Somehow I don't think the inventors of DTMF envisioned this. Update: 10/04 14:11 GMT by M : There's a US mirror available.