At level 20: Gains one additional spell per spell level.

sorcerer (and bard/favored soul) is now able to select new spells known or change his current selection when levelling up in a prestige class that grants “+1 existing level to arcane spellcasting class”

familiar level is equal to the sum of wizard+sorcerer levels

familiar shares spells with master; as long as the familiar is within 5 feets from master, any wiz/sorc spell cast on self will be duplicated on familiar as well