I know that the monk is clearly optimized for up-close work as a tank. What I'm wondering, though, does the monk has any skills with any range greater than touch? If everything is touch only, what is the greatest extent of one of his AOE powers?
The Monk has many many abilities that extend beyond melee/touch range. There are a few runed skills (like Hand of Ytar) that behave like fully-ranged abilities, but most of them focus on the mid-range. The Monk excels at quickly closing the gap to monsters, gathering them up, and then beating them down and debuffing them.
Here are all the Monk skills that reach beyond melee:
Ranged damage reflectors:
Deadly Reach projects force "over a short distance" with every third strike extending to 25 yards. With the Scattered Blows rune, it will hit up to 6 enemies within 15 yards for 170% weapon damage as lightning.