GAH! FI and I were at a BBQ yesterday, and he was talking to two friends of ours (who hadn't yet RSVPed). He taps me on the shoulder: "So-and-so and so-and-so never got our invitation." So now I begin freaking out about how many others are just lost in USPS Land. We didn't get any back! Blergh. Have you guys who have sent out invites had this happen? Did it freak you out too?