They've got access to the Greater Dragonic Rites, which increase their sorcerer level by one, and to Dragonwrought feat which changes their type to dragon and removes aging penalties (so you could start as a venerable dragonwrought kobold for +3 to all mental stats).
The dragon type qualifies them for a few kinds of cheese, too.
Depending on the metamagic, it can up the slot from 0 to 6 levels.