Netflix is like that for me on WiFi using Clear 4G internet, it will never start streaming with the default DNS server so I need to set it to use Google's DNS of 8.8.8.8 (hit the blue arrow on the wifi you're connected to in order to change its settings) and then it will work fine, same thing on my Apple TV 2G but then streaming on iTunes takes forever so I have to keep switching, is kind of annoying.