The title says it all. I am an idiot.
After speaking to Microsoft today for the 3rd time in four days, they advise me that they cannot send me a replacement disc if the disc was never in the case to begin with, that it is up to the retailer to give me another copy (why the first two guys couldn't tell me this is beyond me). So, I call Gamestop back, tell them what Microsoft told me and they advised me to bring it back with my receipt, but that the Limited Edition was released, well, in limited quantities, and if they ran out of copies I would be out of luck. Since I had something to do today after work and probably not be able to make it to Gamestop until tomorrow, I did not want to risk it and used my lunch hour to go home and grab my game and return it.
When I get home I decide to give it all one more good look over, so that I don't embarrass myself. As it turns out . . . the back of the Limited Edition case opens up to reveal - wait for it - the Limited Edition Bonus Disc! Duh!
Ok, in my defense, I mentioned in the previous post how the bottom of the metal case is bent. Because of this, the rear flap was very, very difficult to open. In fact, when I first noticed that the bonus disc was missing, I "attempted" to open the rear of the case and since it did not budge I figured that section did not open. I do not like the look and feel of this metal case either. Halo 2's Limited Edition casing was much nicer. So was Perfect Dark's. This one feels kinda cheap.
Anyway, enough babbling, I am still an idiot. Impressions of the actual game to follow shortly.