I just purchased 'Phone Guardian' from BT on a home phone system that allows me to screen the calls we get (up to 6 a day from spam callers). It works very simply but I'd like to know if there is a similar system for iPhone users. The way it works is that it will allow through people you class as VIPs (family, friends and nominated numbers) but any other call is 'announced' and you have to accept or reject the call. Its a good system and if Apple had something similar it would be very welcome.