If you notice any of the official mmo sites giving away keys, please post here to help other players get hold of them. We still have about 5 people who want to play, but who do not have keys.
Be VERY suspicious of emails you get saying you have got a key. Some are genuine from Square Enix, but there are a lot going around with fake keys getting you to click links to keylogger sites.
My advice is that you do not click any links, and access the SE account site independently from the email. Set up or reactivate your Square account. Then just type in the beta key and you will soon know if it is fake or not. Clicking on email links is not advised, as there are so many waves of fakes going around right now.