By now, most of us are familiar with Google Music, but as Mountain View just outed its new tunes purchasing platform, we had to try it out for ourselves. It's a painless process, particularly for those who have used the Android Market and already have a credit card in Google's system. To grab songs or albums through the new service, you simply go to the Google Music page and click on the "Shop" link in the upper right hand corner. That'll bring you to the music section of the Andr