Dragon #296 has the Dragonscribe PrC which, besides being a 5/5 casting class with easy prereqs (you can meet them at level 10, due to needing 13 ranks in Knowledge (Arcana))
Most of the class features kinda suck... until you hit 4th level.
What do you say to adding Celestial/Fiendish dragons to every level of the Summon Monster spell, including a Fiendish Adult Red Dragon at Summon Monster IX.
Alienists and Malconvokers are grinning so hard right now.
EDIT: Also in Dragon #296 is the Dragon Mystic, which any Dragonwrought Kobold could enter as soon as they have 3rd level spells. Make sure they grab a breath weapon from somewhere. Why?
1st class level adds class level d6 damage of the same type as your breath weapon to all damaging spells you cast.
3rd level adds +(1/2 age category) to the DCs of all Enchantment spells and spells that share a descriptor with your breath weapon's damage type.
5th level really sucks. Don't take it.
Even levels give you +1 Charisma! Wooh!
Still, it's a 5/5 caster level class.
This is why I'm going to see if I can play an old as fuck Dragonwrought Kobold Sorcerer 6/Dragon Mystic 4/Legacy Champion 10; bring on the 1d4+12d6+1 (avg 45.5) damage Magic Missiles!