I read about the FuChat today (via Tuvie), a 'emotion-sensing' concept phone that monitors your tone of voice and body temperature to gauge your mood and could warn you to calm down before you take a call. I kind of like the 'stops' we can put in technology to stop us from doing stupid things. Like the gmail plugins that delay sending emails by 5 minutes or require you to fill out CAPTCHAs if you're sending late night emails, or that bag concept that has a sad face light if it doesn't contain mobile, phone, keys, wallet.
Imagine if these phones could transmit status? I.e. not a good time to call, call later or some shit? I'm intrigued by the possibilities.