You know the thing I always wanted but could never find in the UK (they're available in the US) was something to help with phone calls. It probably isn't a good poduct for the shop, but I wanted a box that fit between the phone and the phone jack a bit like a glorified answering machine, but that would intercept a call before the phone rang and ask the person calling to either 1) enter a code which would allow the phone to ring, or 2) leave a message. That way people who know the person can get through but the person doesn't get all those random phone calls (particularly the ones that involve selling stuff). If it allowed me to call in and get the messages that would have been perfect.