I think this idea has implications beyond corporate security. I'd love to not have to worry about deleting an SMS message after reading it. Takes away an extra few keypad clicks... yeah, I know, I'm lazy.

"Called StealthText, the service deletes texts within seconds of being read. The catch is that it requires both the sender and the receiver to sign up to the service. The recipient does not receive the message itself, but is sent a link to the message which they have to open. They then have 40 seconds to read it before it disappears."