I am a bit opposed to the Novice class, like Ragnarok Online has. I think we should use a more open-ended class system, similar to FFXI. It just makes more sense to start people out in their jobs rather than forcing them to be useless n00bs for 10 levels and spending their easiest and most important levels building the basic skills. Some players new to MMORPGs might need this, but a tutorial does it all jsut as well.
As for classes, I suggest:
Knight - Heavy Weapons and Armor, a good physical fighter, one that can protect more than deal damage though.
MageKnight - Medium Weapons and Armor with some enfeebling magic. Think Red Mage.
Healer - Light Weapons and Armor with recovery and safety magic, like the girl in SoM.
Warlock- Light Weapons and Armor with heavy destructive magic and area magic, like the sprite in SoM.
Juggernaut - Heavy Weapons and Light Armor. All about fast, physical damage.
Those 5 cover about everything that a good party needs. I'll come up with some prestige classes later. You should get prestige classes by completing certain quests that SHOULD NOT have a level minimum. Level minimums SUCK, and I think most MMORPG gamers agree with me.

Anyway, let's hear everyone's ideas for extra classes and basic classes.