The Wizard class has been revealed for Diablo III at the BlizzCon 2008 show.
This awesome CG trailer starts out with a wizard as she enters hostel territory, and ends up with some sweet looking gameplay footage of the wizard casting some very cool looking spells that include: Disintegrate, Electrocute, Teleport, Magic Missile and Slow Time.
More information on the Wizard class can be found at the official Diablo 3 web-site.