When will the Left 4 Dead 2 demo come out for the Xbox 360

"Trade up, your system is going to red ring any day now. Why not wait until Microsoft Announces it on your XBLA? You know the game is slated for end of year 09 so don't even expect demos until October at least."
Obviously a jealous PS3 owner... let me correct him. Oct. 27th if you have a pre-reserve and Nov. 3rd if your a gold member or non-pre-reserver...