Blizzard recently contributed a digitally signed piece of World of Warcraft artwork for the 2007 MMO Calendar, which is on sale now at MMOCalendar.com. The sale of this calendar serves a charitable cause, with 100% of the proceeds going to St. Jude Children’s Research Hospital. We’ve been informed that the calendar will remain on sale through next Wednesday, January 10, so now would be a good time to head over to the MMOCalendar site and pick up some copies for yourself and your friends and family.