For anybody trying to get in touch with Billy, here is his Fan Mail Address:

Unger Entertainment, Inc.,
PO Box 1080,
Studio City,
CA 91614,
U.S.A

Yes this is still working (2012), we will update it if it ever changes and post on the home page if it does. Billy live in studio city and works in LA so unless he has a drastic change in his life this won’t change. -this whole disclaimer is for the benefit of the fans that tend to worry if their mail will get to him and keep asking.