rawr is broken as far as i'm aware, especially since MP5 has been removed from the game. Don't expect rawr to be functional until after cata comes out, and even then expect a lag of at least a month.
fire mage and arcane mage are going to be different, so be specific.
general rule = red, 20 int; yellow, int/haste (unless you are below 45% crit, then go int/crit), blue, int/hit. If it gives a socket bonus of 5sp or less, just use 20 int, as 1 int is now 1.1sp. The other socket bonuses are probably worth having (7, 9, or 12 sp).
Enchants don't change. Spellpower on everything, haste on cloak (or lightweave if tailor), black magic on 1h or 81sp on staff.