Hi all, and congratulations!
I'm a US citizen located abroad and I received my admitted students packet in the mail today (it's interesting, the "ship date" was March 15, so kudos for the ridiculously fast FedEx-ing that happened there). So for those of you wondering if you get a hard copy of your acceptance letter -- YES. And a decal to boot. There isn't much other exciting information in the packet, except the Financial Aid office did include some memos about how financial aid packages will be available by the end of March/first week of August.
Nonetheless, it's a happy big envelope to receive!