I've really been looking forward to trying Mercato. Given their no-reservation policy, does anyone know if they're at least willing to put your name on a list upon arrival and then give you a call on your cell phone when your table is just about ready? I remember reading that Melograno is doing this. Especially if we go to Valanni for a drink, (Valanni being in the same family) I'm hoping they'd be willing to give a shout out. Has anyone had this experience?