Apple TV Home Screen is Blank
This is a known issue on the 2nd and 3rd generation Apple TVs, resulting in an almost empty home screen (so you can't see Hulu, iTunes etc.).
To fix this go to Settings > iTunes Store. Change the location to something other than the US, then change it back to the US.
If the screen is blank after a recent setup, then it's possible you mistyped our DNS server, so you are not getting internet access. If that could be the case, follow our setup guide for the Apple TV again, and see if you have the right values.