I heard that the beta will be released in October. Similar to the modern warfare 1 beta release. I am pretty sure that the beta keys are already reserved for a few people. The only advice i have if you want a beta is to sign up at modernwarfare2.net infinityward.com and other call of duty modern warfare 2 related sites. And there WILL be jeeps in the beta mulitplayer, im not sure for the actual game though, oh yea and there's a turret attached.