Shazam is great and SportsTap is on my front screen.
There is a program called "Caterpillar", now called "Kate" for jailbroken 1.X iPhones that was a very useful utility. It added the ability to hide SMS messages as they arrive and more importantly, it included a customizable missed call, missed message alert. The iPhone needs these functions desperately. The makers of "Kate" have no plans to offer a version through the App store.
