Wow, some of those spells look really amazing. It is good to see that teleport is coming back in Diablo 3 as well. That disintegrate spell looks really powerful, though I imagine the mana drain is quite high if you use it for a reasonable amount of time. The sorceress in Diablo 2 had a lot of problems early on with lack of mana when lots of cold attacks were used. Either using warmth, or using lots of mana potions could combat this. Obviously both of these had drawbacks. If you could stomach the annoyance of having to reload potions all the time, this approach would probably be beneficial; early skill points lost in warmth could turn out to be a big drawback later on.
Hopefully in Diablo 3, Blizzard will have regulated the way attacks such as disintegrate use mana and are not so harsh as with some of the mana drains from sorceress attacks. The slow time move looks really amazing too, that could prove to be very, very useful! I wonder if there are any limitations as to which enemies it could be used on. If that could be used on bosses it would be incredible, but maybe a little overpowered. Slower enemies could be a great target for the disintegrate spell as it seems to kill an unlimited amount of enemies in a line. Another interesting idea for a wizard spell would be to allow the user to create a similar disintegration blast, but in a circular radius, with say, enemies being disintegrated if they spent too long within the circle of disintegration. This combined with the slow time move could be a really, really powerful combination.
The magic missile technique looks a little bit poor, but obviously they have to balance out the good skills with the bad skills. The electrocution attack seems really neat; it seems as though if the enemies are close enough, they electricity arcs between them, resulting in added damage (hopefully for the same amount of mana usage). I wonder if there is a limit to how many enemies the electrocution attack could damage at once… If not, it would be great to gather up a lot of enemies in an enclosed area then unleash a high level electric attack on all of them. It seems the electrical attack for a bunch of nearby enemies does what the disintegration attack does to enemies that happen to be in a line.