You won't draw any cards until Eureka is finished resolving.
Basically, you cast Eureka, Eureka resolves, you both start putting things into play. If you put one of those creatures that you mentioned in play, their CIP effects will go on the stack, but won't actually resolve until Eureka is finished resolving, so by the time you draw the card(s) from those creatures CIP effects resolving, Eureka has already finished resolving.
Bill
Technical correction: It will trigger during resolution, but won't even go on the stack until Eureka is done resolving.