Here are my current stats, with skill bonuses:
DPS:9,000 (I know it's a little low..)
Armor:8400 (With Deadly Reach, but that's almost always up. This provides around 73% damage reduction.)
Resistances: 380 to all. About about 55.8% damage reduction.
Dodge: Roughly 38.8% with mantra
Not sure what I may be missing, but pretty sure this is all I look at for my tank spec. I'd like more Dex, or to care about it more, but if it's not there I don't freak. I'm here to be a meat shield.
So lets jump into the skills, I'm pretty set on all of them, except my secondary, which I choose earthen ally or inner sanctuary with the damage reduction, depending on how I feel my groups play style/skill is. I used to use cyclone strike or even seven sided strike for its 1.5s of invulnerable, but their spirit cost is just too high.
Primary: Deadly Reach with Keen eye rune, this is super important, this skill lets you generate large amounts of spirit, gives you an almost constant 50% boost to armor, and keeps you out of a lot of AOE if played right.
Secondary: Mystic Ally with Earth Ally rune. This is what I've been using, and is nice for the HP boost and he does a good job tanking (its not that he dies fast, cause he doesn't, just sometimes his tanking leaves something to be desired.)
So I strongly suggest Inner Sanctum with circle of protection, this will help you recover should you get blocked in, or for keeping enemies from rushing straight to your DPS. Its damage reduction is the icing on the cake.
Skill 1: Breath of Heaven with the Circle of Life rune. I chose this because it keeps me up and allows me to kite very well, with out this and Serenity kiting would be close to impossible with some minion combos. I expect people to disagree with using Breath of Heaven, but for act 1-2 Inferno, it's paying off.
Skill 2: Blinding Flash with the Blinding Echo rune. Gives you and your DPS time to kite, re-position, or kill whatever you flashed. Obviously you get the double flash...
Skill 3: Serenity with the Ascension rune. Makes you invincible for 4 seconds and is extremely cheap to cast. The #1 must have skill for a monk tank.
Skill 4: Mantra of Evasion with the Hard Target rune. This is a must, I used to rock mantra of healing with circular breathing in Hell (I thought I needed a ton of spirit to heal, but armor is way more efficient), but this makes all the difference. An Extra 20% armor and 10% chance to dodge, talk about a tanks wet dream.
Passive 1: Transcendence, makes it so all your moves heal you. (Keeps you up.)
Passive 2: One With Everything, makes it so all your resistances are equal to your highest single resistance. A must for inferno and even late hell. Choose to stack 1 kind of resistance on your armor for this to pay off.
Passive 3: Seize the initiative, Increase your armor by an amount equal to your Dex. Adds a lot of armor, a must.
As for a weapon, right now I have a cheap, high damage weapon to do some damage and be able to generate some decent hp. Ideally you want a 1 hand with high damage, lots vitality and dexterity, and some sort of life on hit would be nice.
For the rest of my gear I stack resistance (I picked arcane cause I'm lazy and it's at the top of the search by list for armor) and resistance to all on the same piece of gear for maximum resistances. I aim for high armor pieces to get my armor as sky high as possible. After that I look for Vitality > Dexterity > Int > Str.
EXAMPLE: When I search for gear on the AH the 3 criteria I select are Arcane resist, Resist to all, and Vitality.
I just want to say that I was having some issues with inferno, was tanking but not how I felt I should. I did a little research and changed my primary from way of a hundred fists to deadly reach, and I changed my mantra of healing to mantra of evasion and it got way easier. I can sit and tank and spank around 75% of the rare mobs or champion groups we encounter, as opposed to about 15% before. I can honestly say before I was disappointed with my monk, but since I've done some research and been using the appropriate skills (my gear hasn't changed almost at all), I'm a beast of a tank in Inferno act 1 and what part of act 2 I've done with my group. Went from dieing fairly often (anywhere from 3-5 minutes) to just a couple times in a complete act 1 run.
On a side note, once you get to the point where you can tank stuff easily, Inferno becomes hilarious. When they die 10x for every one death of yours, you feel good and it makes you laugh. Enemies with mortars and enemies that explode after death will be the bane of your DPS existence.
I'm not going to talk about play style at all, because I expect everyone reading this to be level 60 already... Hope this guide helps get your monk to your tanking expectations!