Rules based policy engine

[arne anka]

> It may be possible to use GSM call towers to give a good enough location
> for these rules.

a gsm cell is usually much bigger than most restaurants -- and gps might  
not be available inhouse.
btw: a rule that analyses calendar entries and depending of the character  
of the appointment disables ringing might be sensible.
thus i only have to select the importance/category of the appointment and  
not to worry about forgetting to disable the phone.