You know how members have that membership icon next to their key on the pager? I think it'll be quite good if that icon would change colour, to lets say green, if a person is contactable. So lets say I add a non-member, Bob, to my pager. He at first would see the normal pager icon next to my name (on his pager). Then I decide to contact him (which should let us have a 90 minute conversation), the pager icon on his pager should now become green. When the 90 minutes finish, it should return to normal. Or lets say I said that "Let all non-members contact me", any non-member who has added me will now see a green icon next to my name. The benefit would be that people would know when they can talk to you. Right now I feel as if all my non-member friends don't realise they can contact me.