I just bought a 8GB iPhone on 2/1/2008. As a Mac user for years I love the iPhone. I did notice that my iPhone gets really hot while surfing the net via both EDGE and WiFi, also my battery is goes from full to half after I'm on the web for more than 10 mins continuously. My question is, is this normal iPhone behavior? Or as I'm still under the 14 day return window should I take it back and get a 16GB?