KishKish, makers of SAM (Simple Answering Machine) for Skype, have now added a lie detector feature to the mix, claiming to detect stress in the voice of your Skype caller, alerting you to any bending of the truth.
It's your $49.95 a year, but we're thinking it'll be another decade or two before voice stress analysis can absolutely detect if someone is lying to you. This thing could cause more problems than it solves. There's good reason why this technology is not admissible in court. The video on the company's website is quite entertaining, though, catching old Slick Willie in a lie about Monica Lewinsky.