yeah 5 is supposed to be released nov 11th of this year dude. The beta version is supposed to come out soon (no date given as of yet, xbox 360 beta is out) to be able to play the beta (usually demo version) you will need to register at callofduty.com to receive a key... Supposedly the game is already out (not leaked yet as far as I know). I know a level designer that works at EA and he is already playing it...
-Dan