Now that I can finally form coherent sentences again, I thought I'd post my acceptance as well. No email, just a large envelope in the mail yesterday. I am completely overjoyed, overwhelmed, etc etc. Congrats to everyone else and buena suerte to those still waiting.
Oh, the letter was dated 2/2 and yes, "with enthusiasm" was underlined in my letter as well. I'm thinking it's a uniform thing.