I recieved a save the date from a friend and she had cards from BBB showing her registery in with it. I thought nothing of it, in fact I was like "awesome, I won't be giving this couple a crappy wedding picture frame!"
But I have noticed that it's not super cool to put those things out there so I was wondering on mine if I should include ours in the save the dates or leave it up to guests to find out another way like wedding website (Which I need to seriously work on before I do the save the dates ahhh...!)
Yes - Add the BBB card thing in with the STD's.
No - Let them figure it out another way.