Being single has its own perks and the best way to rate your relationship history is to keep track of them via software app for the iPhone or iPod Touch for memories to show off after some time. The Little Black Book 2.0 for the iPhone or iPod Touch can do just that, an app suited for bachelors and bachelorettes. The Little Black Book 2.0 app for iPhones or iPod Touch is now available at the iTunes App store for $4.99....