As many of you noticed today, the CoH2 beta webpage has changed a little. You can now pre-register your key if you picked up a THQ code at a trade show such as Eurogamer Expo, Gamex, or Paris Games Week. This is simply to reserve your spot in the first closed beta. The beta has not begun yet, but by pre-registering your THQ code and attaching it to your email address, you'll ensure that as soon as the beta begins, you'll have a key to activate and download the beta through Steam.
Again, beta has not yet begun, this is only to reserve your spot. If you have beta access through a preorder, this is not for you. You will have beta access like normal through Steam when the time comes.
A quick aside - when you input your email address, you will not receive an email confirmation. The only time you should see an email from us is when the beta becomes available. http://companyofheroes.com/beta