WoW: Merge Your Blizzard Account w/ Your WoW Account Today
Having trouble merging your account or want to know what the benefit from it is? Khalus over on our forums has posted a very informative thread about it. Soon it may be a requirement for you to merge your account with battle.net and it's a big security jump by doing it now. You can also apply for betas and save your keys for other games so it's a good idea to get started.
Click here to view the thread. It even has pictures!