Also, it would be extremely cool to have an at symbol capability, where you can program in things that occur at a specific time during the day. This would prevent me from missing meetings :).

I would use it like:

  Check Email 15
  Review Big Document 1:30 (does it support hh:mm format?)
  Status Meeting 1h @10am (does it support "h" as time?)
  Break 10
  Lunch 30 @12pm