We ended our 2006 iPod Year in Review with some predictions: 2007 would be the year when the 100 millionth iPod was sold, iTunes Store sales would grow in the billions rather than millions, and the year would start with exciting new hardware and accessory releases. We also called out two possible iPhone release scenarios, suggested that Apple TV (then iTV) would need some help at its $299 price point, and discussed good and bad potential outcomes…