Valve sent an email this week to account holders with an interest to participate in betas. A survey is required for a chance to win a beta key and in the email the link does not function.
Go here :
http://blog.dota2.com/ and click on the "Dota 2 Survey" link but first make sure your Steam client is closed. Your browser should ask to launch a program to open the link. Accept and follow prompts.
If you are chosen Valve is giving beta testers 2 additional copies for handing out to friends. Please think of me if you are chosen.
That is all.