I got the mail, have a Diablo III collector´s on my B.NET account and beat it just once, haven´t really touched it since and did get a copy. I gifted the CD key, and haven´t heard from the other person if it didn´t work, so I guess it did.
I haven´t gotten a code yet, and like you don´t have a 3DS but I do have registered some 3DS games on Club Nintendo. Perhaps they think I already have a system but haven´t bothered to register.
I searched the store and asked about the UMDs in the local Eagle Pass stores, but I was out of luck. Not like I was really looking forward to it, I only kind of wanted to find the Final Fantasy VII Advent Children UMD.
Saw this just yesterday on my local Walmart, had like 10 boxes on display but ultimately abstained from getting one because I remember reading that these have terrible input lag.