Do you have so many friends and family that you want to let know that you couldn't pick up the phone and call them? It would be much more personable if you did this (i dont know if this is the right way of doing things, but oh well). I mean, when I got engaged, I knew that those that I wanted to let know immediately didn't number so many that I had to send out cards or the like, but I dont know your situation. If you really want to send out the pictures to your close friends and relatives, I would say send these out with your save the date cards (or invites if you aren't sending save the date cards).