If I was at Google, I think my 20% project would be adding voice support to Google Calendar. It would be pretty sweet to be able to press a button on my phone and say “February 3rd, 3PM, doctor’s appointment, remind 1 hour”. It would read back what it heard and you’d say “confirm” to set it.

I guess it would be like Jott but free, and not requiring phone calls. Your voice would be HTTP POST’d up to the server or something like that.