Hyzenthlei's formulas are completely empirically derived and since the actual item calculations are approximate and round by integers, the numbers are very messy.
You can check some calculations being done on actual items by adding '&hyz=1', as in
http://www.thottbot.com/?i=40573&hyz=1
If you're just looking for simple numbers comparing the 'cost' of each type of stat, here's a shameless plug of integer-based values of the 'cost' of each type of stat point I came up with, derived from some slides at Blizzcon (that said Dodge = 12 and Crit = 14 points iirc) - ie, these are my best guesses at the 'real thing' rather than an observed average.
The Passive Stats:
Strength = Agility = Stamina = Intellect = Spirit = 1
Attack Power = 1/2
Ranged Attack Power = 1/4
Ranged Attack Power (Equip:) = 5/12
% Hit = 10
% Crit = 14
Armor = 1/10
Skill Defense = 1
Skill Defense (Equip:) = 3/2
Damage Shield = 3
% Dodge = 12
% Parry = 20
% Block = 5
Block Value = 2/3
HP/5sec Regen = 4
Mana/5sec Regen = 5/2
% Spell Crit = 14
% Spell Hit = 10
All School Spell Damage = 5/6
Healing = 5/11
Fire / Frost / Nature / Arcane / Shadow / Holy Damage = 7/10
("Of Holy Wrath" = 1 point for the first 18, 1/2 point beyond that...don't ask me why)
Fire / Frost / Nature / Arcane / Shadow Resist = 1 (Ring Resist = 3/4)
Relative amounts of stats given to each slot type of equal iLvl:
7/7 – head, chest, legs, two-hand
5/7 – shoulder, waist, feet, hands
4/7 – neck, wrist, finger, one-hand, back
2/7 – ranged
? – trinket
To calculate the 'total cost' of an item relative to another, raise each individual stat to the log2/log1.5 (~1.7095)th power, then add them together. This makes it so 8 stamina + 8 strength has the same 'cost' as 12 stamina on a single item, ie 8^1.7095 + 8^1.7095 = 12. This property was also derived from Blizzcon slides that said 8+8=12. This has the effect of discouraging excessive stacking of a single stat in any one place.