Another mortgage calculator for the iPhone, sure. They're handy.
Compares current loan terms to previous ones for quick "what if"
comparisons. View amortization schedules by month or year. You can
also enable a feature that will tell you what your salary should be to
make a given payment (ie, How much house can I afford?).
There are also a few cool features that help you while you're using it (a movie will be posted later).