witch and the shadow power source

i would LOVE to see, finally, a witch class. i had long envisioned a witch class as primal, but a shadow-based witch class would be great.

this would be an awesome--and solid--shadow power source line-up:
hexblade - defender
assassin - striker
necromancer - leader or controller (i vote controller)
witch - controller or leader (i vote leader)

p.s., i could see constitution being a prominent stat within the shadow power source, a la wisdom for divine, intelligence for arcane, strength for martial, constitution (and wisdom) for primal, and wisdom (and charisma) for psionic.