Do you want to feel like a real-life spy? If so, the BioWallet application for the Android OS could be just the thing for you. Android and Me says that this app, which has been under development for quite a while, will provide state-of-the-art information security to Android users.
The BioWallet app allows your phone to use both iris scanning and signature recognition as 'keys' to get into your phone. If you've ever been paranoid about smartphone security, or just wanted to feel important, this app could do the trick. It's close to release now, and if you sign up at their website you can get in line to try out the beta version of the app.