Stretching the digital purse strings of impulse buyers to the breaking point, Google kicked off its new Google Music service with an awesome sale for the holiday season, wherein hundreds of thousands of albums and individual tracks were priced at half off. Though the promotion was marked as a limited time offer when it began in mid-December. Hark, but Christmas has come and gone, and the sale doesn't seem to be going anywhere. What are you waiting for? Go buy music now, because it isn't any cheaper anywhere else, and it might not be so for long.