1. What is a non-combat interesting way to use air magic?
Create various kinds of gasses. Laughing gas, hypnotic gas, gas that incites rage, etc.

2. What is a single target interesting way to use air magic?
Disperse the kinetic energy of a single projectile using the "movement" factor of air magic.

3. What is an area of effect interesting way to use air magic?
An oxidation field. I don't really know what this would do, though. Metal would rust, but what would happen to other objects? And would a field with an hyper enhanced rate of oxidation be lethal to humans or any organic life?

Also, thinning the air so that it becomes hard to breathe. Targets faint, and you can set about dealing with them as you please. 'Course, this assumes that your target needs to breathe to begin with.

4. What is an interesting way to block using air magic?
A series of hard air plates or blocks that are angled so that deflect attacks instead of taking them head on. Alternatively, using the "movement" factor of air magic, create a shield that alters the path of objects so they miss you. Kinetic redirection.

5. What would be an interesting way to impede someones movement with air magic?
Make the air really thick, so its like moving in water or a block of soft clay.

Or release a number of balls that are compressed air. When someone touches it, the ball burst knocking back the person. No real damage dealt though.

6.Can you think of anything else that would fit the Dresdenverse and be really neat in a game for air magic?
EDIT: I'm becoming fascinated with the idea of giving air solid properties. Like the thick air idea. Or set up a number of invisible hard air spikes in an area. Or a globe of clay-like air. Watery air, sticky snot-like air, chewy rubbery air, etc.

My brother Arandmoor's character, The Archivist, has a fire shield rote. His take on it relates to his aspect, My Deep-Dark Secret.
His Fire Shield uses the Cleansing Power of Fire to cleanse away negative possible outcomes. it's an area of very³ Grey magic, but it relates to  My Deep-Dark Secret

Sorry, my head isn't wrapping around this shield all that well. So its essentially a probability spell that uses fire magic to affect the probability of negative outcomes? That has a Scarlet Witch vibe to it, which is neat.

A) Shield of vibration. Everything that comes through the shield is shattered.

B) Gather ghosts and compress them into a shield of ectoplasm. For a bad guy necromancer.

C) Pure spirit magic shield that is netlike. Catches projectiles/attacks instead of reflecting them.

D) Last idea I was tinkering with is a kinetic redirection field(probably a bubble of magic around the user). Projectiles that enter the field have their kinetic energy redirected to move out of the field. Would this be a veil?

Absolutely fantastic!

Thanks for the quick reply.

I guess I'll have to suffer the shipping cost for the books. Bleh. My bank account is going to be crying for a bit.

You could also weaken his "good" side persona. It stands to reason that if the darker side is his released state, its his "normal" state. And the good side is actually the aberration. So if you're having characters of a certain level, then the "sealed" state would be a bit weaker than them, while the DarkSide state would be on par with the rest of the team (or just a tad bit stronger, to make up for being the runt most of the time).

Sentinel. I've always liked that, but that my just be the Alan Scott fan in me.

Ehm... I don't post much, but this piqued my interest. I just have one question:

-Finally, there is no one "Sherrif". It's basically done by "first come, first serve". Since their powers are effectively fueled by their souls, the mark of an act that defies the laws is apparant to the other Alts, which basically works like sensoral overload/repulsion. There are some who do hunt down lawbreakers, but anyone is capable (and entitled) to fulfill the deed.

So the Laws aren't a set of rules that are written down and agreed by all Alts, but are an inherent part of their powers? And instead of them functioning like a barrier against the action, they are more like lines that if crossed will send out a beacon to other Alts notifying them?