Actually, Santorum won half of Iowa's delgates....Newt got a goose egg.
Not quite. In fact, none of the candidates have any pledged delegates to the convention at this point. The delegates for Iowa will actually be selected later in the year at a state convention. The caucuses only served to elect people to vote for national delegates at the state convention, which is held several months from now. So in reality, Iowa will be one of the last states in the country to select national delegates.
You are also wrong about Santorum getting half of Iowa's delegates and Newt getting none. The projected Iowa delegate totals for each candidate are as follows:
Romney - 7
Santorum - 7
Paul - 7
Gingrich - 2
Perry - 2
Paul: 6
Santorum: 6
Romney: 6
Gingrich: 4
Perry: 3
that is the delegate count after Iowa.