You need to rub it in some more, this post is too neutral.
First, change the title to "OMG OMG I GOT IN!!!1!!!1!!1!!!!!!one!!", this will notify people that you have gotten into the Red Alert 3 Beta perfectly and no one will be wondering what the topic is about when they get in.
Next, add more "!", and randomly bold, capitalize, and italicize things.
examples:
but THE main menu looks AWESOME!!1!!!!!!!!
Finally, just to give one more "forget you" and rub it in some more, taunt everyone by proposing the question "Is anyone else in the beta!?!?1/11!??!/1!??!!!?"