By Declan McCullagh, cnet news

Facebook grew to more than 100 million users by providing a way for friends and family to keep in touch with one another. But few, if any, probably expected that their Facebook accounts offer lawyers a handy new way to tell them that they've been sued.

It's already happened in Australia, where a court recently allowed a lawyer for a mortgage lender to use Facebook as a method of serving legal documents. The purpose of the suit: to let a couple know that they're about to lose their home through foreclosure after defaulting on a loan.