Don't ditch that premium cable subscription just yet. The long-anticipated HBO Go app just hit the iOS App Store and Android Market, bringing original HBO series and a variety of blockbuster films to your mobile device. You'll need an HBO subscription with your cable provider to get past the login screen, but unlocking all that the service has to offer using our Verizon FiOS account took just a second, and we were off and running with Avatar less than a minute after launching the app. We'll have a full hands-on later today, but if you're an HBO subscriber with an iOS or Android slab, head over to your device's re
