Optional audible move notification

There should really be an option to play a sound from the webpage when it´s your turn, for obvious reasons. I´m sure a couple of thousand people would appreciate it. I know you can turn on email notifications and put your email-client to play a sound, but thats not optimal (fetching intervall, other mails, people not using a client etc.) Should be very easy to implent, or not?

If you're using Firefox, there's a Greasemonkey script that shows "x games waiting", so you can do things on other web pages and still keep an eye on it. Maybe one of our Greasemonkey scriptwriters could give us an audible equivalent.