I might be getting an iPod touch in a week or two, so I've got a couple of questions about it beforehand. First of all, how is the battery life really like on it? I've heard people say that the battery life is not nearly what they expected, but I'm pretty sure they had wi-fi on all the time. Secondly, is it easy to turn the wi-fi off and on? I hope that it would increase the battery life only using it when needed; does it? Finally, are people still having issues with the screen quality? I won't have too many movies on the touch, but I would like them to look good if and when I do.