I have an intermittent but frequent problem with my Epic using the market. I click Install Now on an app, and under the Downloading section of the market it says "Starting download" with a bunch of green and white stripe progress indicators. But it just sits there and does nothing. Sometimes turning wifi off fixes it - sometimes it doesn't. But I'm sitting here with both solid 3G signal strenght (5bars at the moment) and 2 bars of wifi in my house. My computer that I'm typing this on is on the same wifi. So why does the install hang so many times?