CardWeb reported that MyFICO.com now has a feature that will find you a list of mortgage rates that fit your particular credit score.
My limited tries show that most of the best rates actually have a wide acceptance range of credit scores (like from 620 to 850 and from 640 to 850), so for people with normal scores, this feature does not help much. Number of providers from MyFICO is quite limited, so make sure you try BankRate and other mortgage comparison shopping sites too.