Just as we reported on the rumored release date, we found that the release date is TRUE! Modern Warfare 3 will come out on November 8, 2011! This has been confirmed by MANY sources. First, an Australian poster confirms it,

Also, on Amazon and Gamestop, you can now officially Pre-Order Modern Warfare 3 for $59.99. This also confirms the case cover of Modern Warfare 3. We have updated our homepage with the Xbox 360 case and the PC case. We did not
 use the PS3 case because the picture was very wide and would look stupid.
Also go check out our Pre-Order page so you can Pre-Order it.