Blizzard is once again calling for gamers both old and new to sign up for the free 10-day trial of their famous MMO Role-Playing Game World of Warcraft.

Interested individuals interested in signing up can follow the link at the bottom of this entry to register for this free trial. Characters created by users with their unique Free Trial accounts will not be deleted and can still be used once gamers renew their accounts by buying a retail copy of WoW.

There's more good news. Once accounts have been upgraded by purchasing the retail copy, users will be given another 30 days of free WoW action. Only after these free trial periods will the regular monthly fees be applied to gamers' credit cards.

Come to think of it, Blizzard already has its hands full with its six million-plus subscribers, so why call for new players? Should Blizzard be worried about the other popular MMO Gods & Heroes especially after it launched its own registration for a free 10-day trial?