Can anyone recommend a good armband for the Shift? I like to take my phone for music while running, and an armband would be sweet. I would want something that keeps the phone secure, though, and most that I see are always open. I would probably wear it on my forearm so that I could get to it, and having an opening on any side would be bad. If all else fails, I could wear it on my bicep and leave the opening at the top.