Right now, I am planning on using mostly standard races:

Human
Elf/Half-elf
Dwarf/Mul
Gnome
Halfling

with the additions of

Half-dragon
Avariel
Possibly a psionic race of somesort
a shapeshifting race
and possibly one or two others.

Half-orcs are not allowed, since in my world, humanoids (orcs, kobolds, etc.) are not true races... they are player races which have been horribly changed by the evil magis of the enemy. For instance, a kobold is actually a halfling that has been irrevocably altered. Orcs were once dwarves, and so on.