So, not seeing it on the standard equipment lists (must have been an accidental omition), so checked the general rules on spell components, from 3.5 SRD:
Material (M): A material component is one or more physical substances or objects that are annihilated by the spell energies in the casting process. Unless a cost is given for a material component, the cost is negligible. Don’t bother to keep track of material components with negligible cost. Assume you have all you need as long as you have your spell component pouch.
It looks like I should assume that a standard spell component pouch contains a number of elven children hearts, right?
Edit: Someone the WoTC forums pointed me to table in BoVD for spell component prices (why they don't mention this in the spell chapters is beyond me). Those of you that thought that finding your spell component pouch full of hearts was silly, if not just utterly despicable, will be glad to know that the offical WoTC price for a humanoid heart is 1sp.