For those of you who aren't familiar with Shazam, it's a music identification service that can tell you song information just by hearing a sample of the music. The service has followed the smartphone's rise to popularity with multiple successful mobile apps.
In fact, Shazam was the first song I.D. app I downloaded when Apple launched the App Store in 2008. It worked great and even more importantly, it was free. You could tag as many songs as you wanted and it didn't cost a dime. But then things changed...