Forget hacking. It works but it's illegal. Big data mining is the future of cyber espionage. It is not illegal as long as the data is open source and in the public domain. And all that data on "open" social networking Web sites are most vulnerable. Two recent commercially developed software packages could soon be giving your government and employer and possibly anyone else who is interested – ways to spy on you like never before, including monitoring your words, your movements and even your plans now and into the future.