This might just be an over sight but it looks like theres one skill missing on the wizard skill list that is shown in the video.
In the blizzcon vid at the 1:40 make the wiz casts basically a targeted explosion. It makes a little orb at the target location then explodes.
I couldnt find a description on the list that fit the spell, does it have a name?
edit: just watched thru the wizard trailer again and the spell im talking about is used a lot in it.