If you have a Gamestop it's on their Spring Breaks sale list through the 7th for $19.99.
http://www.gamestop.com/xbox-360/games/la-noire/77190
http://www.gamestop.com/ps3/games/la-noire/77192
Full sale list:
http://www.gamestop.com/collection/gamestop-sale
I do not believe this deal is dead yet. At least not for people that have already made a purchase recently through Dell.
I bought a coupon the first time from eBay and got my XBL card no problem. Now I have a Dell Purchase ID from that order.
Just go to this website...