Shining Spellthread Permanently embroiders spellthread into pants, increasing spell power by 35 and Spirit by 12.
Brilliant Spellthread Permanently embroiders spellthread into pants, increasing spell power by 50 and Spirit by 20.
Azure Spellthread Permanently embroiders spellthread into pants, increasing spell power by 35 and Stamina by 20.
Sapphire Spellthread Permanently embroiders spellthread into pants, increasing spell power by 50 and Stamina by 30.
According to Wotlk Wiki, Tailors will get new leg enchants. These are sellable though, so they may be another reason to level tailoring. I guess I have to decide if I want Leg enchants, Cloak enchants, bags, nets and the odd cloak. Not a bad list really, but all the socketing with Blacksmithing and a menu of good weapons and armor for both melee and spell is compelling. Also didn't they remove Potion Sickness? If so Alchemy is back in the mix with those wicked trinkets.