If you're anxious to start checking out the game and hunting down the bugs, we've got you covered here at Massively with a pile of beta keys courtesy of Perfect World Entertainment. Just visit our giveaway page to grab your key code, then head to the Perfect World site. Log in, go to "My Account," click "Redeem Beta Keys," and enter your code. That's it -- you're in the War of the Immortals beta!
Have fun, and thanks to PWE for the beta keys!
[UPDATE: The beta start has been delayed until November 9th]