Assassin's Creed 3 will feature some form of microtransactions, according to the most recent PlayStation Store update. The latest update includes several bits of DLC for Assassin's Creed 3, notably five different packs of "Erudito" ranging in price from $0.99 for 20 all the way up to $19.99 for 950.
We currently have two theories. Either Abstergo has created a new brand of cheese-frosted tortilla chips for the discerning scholar, or Erudito is an in-game currency used to unlock content. Our money is on the latter, and presumably Ubisoft hopes yours is too.