Our drivers license is flag on the computer that we are permit holders. So whenever our driver license is run it comes up. (personally I wish it was on our drivers license, since they are connected in the computer)
I don't see the value in having your DL indicate your CCW status. I guess there is one upside - if a state did do it that way, there would be no need to issue a separate CCW card at all.
But, I see alot of disadvantages to this idea. It seems I have to show my DL to many non-LEO people - like every time I use my credit card in a store, check in to a hotel, check in for a flight, etc. I don't feel all those people need to know if I have a CCW...