Hot on the heels of its leaked cover photo of the new iPod, Newsweek has posted an article detailing the new features of the fourth generation (4G) iPod. The new iPod, which does not get a storage increase this time around, will be available in 40GB ($399) and 20GB ($299) capacities only — Apple said it is phasing out the 15GB model. The 4G iPod is about a millimeter thinner than the previous generation and features: 12 hours of battery life (a 50 percent boost); an iPod mini-like click wheel; more efficient menus (less thumbing required); and the ability to create multiple on-the-go playlists and delete songs from them.