You can now buy account-upgrade keys and download the game client for World of Warcraft: The Burning Crusade directly through the account-management section of www.worldofwarcraft.com. The direct online upgrade method is the most convenient way to upgrade to The Burning Crusade and join the millions of players who are already adventuring beyond the Dark Portal.

All you need to do is:

1. Login to Account Management
2. Click The Burning Crusade "Download Now" button
3. Enter your credit card information
4. Follow the link to download The Burning Crusade game client

That's it! If you haven't upgraded your account yet, now's your chance to take your World of Warcraft experience to the next level, whenever you want.