Nah - she (vampiress) will be just normal Resistance based char (altough I like the idea of unlockables and mini-bosses).
Well... if Dormouse revealed one of the planned new classes, then I might aswell tell you about the rest of 'em.
Here's who I want to add:
Vampiress: undead lady in white garment.
Resistance
Form of Mist - invunerability for a short period time.
Bat Swarm - similiar to normal Swarm, but steals some life for the Vamipress.
Drain Life - sucks the Health from the enemy (barriers doesn't matter)
Anti-mage: tatooed and naked tribal-style guy.
Intellect
Dispell Shield - deals huge damage to the enemy's Shield.
Backlash - deals damage for every enchantment/curse enemy has.
Destroy Magic - ends the duration of all of the enemy's curses/enchants and destroys the Shield. Chance of success.
Electrician: - modern guy with coat and googles.
Force
Static Charge - some damage to the opponent.
Battery - boosts Incantation, but ends if you cast anything other than Offensive spell.
Dunno - I don't know yet

. Ideas are welcome...
VooDoo: - big, black and mean voodoo priest.
Communion
Hex - casting a curse on the opponent will cause some damage.
Dunno - I don't know - maybe just an Incantation lowering curse. Suggestions welcome...
Hate - curse that makes enemy slowly lose Health. Sort of additional, unblockable poison.
I'm still not sure about the last, Incantation-based character. Someone on GMC suggested a Chronomancer - it's a nice idea, but I'm open for others.