San Fernando Valley

Many industries complain that new government regulations are bad for business; now, we're hearing it from the adult film biz. A proposed L.A. city regulation to require porn actors to use condoms has adult film makers threatening to leave Tinseltown -- and to take the lion's share of an $8 billion-a-year industry with them.

The dirty little secret behind many new technologies is porn. From cinematography to video cassettes and the Internet, pornography has been a key driver of growth. Now, porn is showing up on mobile phones and it's relentlessly wearing down the wireless carrier's bandwidth. In Japan, where...