I just came across an interesting app called "Agile Lie Detector". As the title suggests, it claims to be able to pick lies apart from the truth. I haven't tried it out yet, but if anyone else is interested it's $7.99 and available here. PS: Arn you should post this in the iPhone Blog on Macrumors. Update: I found a few more (cheaper) apps with the same functionality, just search "Lie Detector" in iTunes.