How does World of Warcraft being Free-to-Play* work with existing accounts?

WoW is now F2P up to level 20, so can I make and play some twinks on an existing account (and maybe just be locked out of my 85's)? Or do you need to make a wholly new account?

2 Answers

The "Free to Play" bit is only for trial accounts. Accounts that have previously been full accounts will need to be resubscribed, and can not be played for free up to level 20.

You can create a new WoW-starter-account inside your exisiting Battle.net account, when you log in the game asks which one to use.