There's two things that haven't come up yet I'd like to see as their own core classes:
Cavalier or Knight (something that sets the knight-in-shiny-armour archetype apart from the run-of-the-mill foot soldier Fighter)
Battle Priest or War Cleric (works much like a Cleric except battle spells are augmented and curing is dialled way back)
Also, I see all kinds of things on the poll list that to me are just Wizard variants (Invoker, Warlock, etc.) but where are the Illusionist and Necromancer?
As for Swordmage, that to me sounds like a class that wants to do everything - fight, cast, both at once - a one-man-band, in effect. Tricky to design so as not to overshadow the rest of the party, and to still need a party to run with.
And I'll throw this out there yet again: Barbarian should be a race; a sub-race of Human, not a class.
Lan-"and what in the nine hells is Vampire doing on that list?"-efan