Unfortunately not for simply reading this thread, but close to it.
Simply sign up for a Magicka: Wizard Wars alpha account here:
If enough people sign up to hit stage three of their alpha signup, EVERYONE who registered up will get a Magicka base game key redeemable on Steam. Pass it along to all your friends who use Steam. Even if you already have Magicka, sign up and help us who want it out, not only will you get a key you can give to a friend or do whatever you want with it, but all us who want it will also get a key.