This is definitely an issue between SE and Comcast. I got frozen after switching nations and starting Windurst 1-1. I entered Inner Horo Ruins then dead at downloading data. I tried all the normal reboots/ports/modems/files but I got same response from PC, Xbox, and PS3. My wife plays and is on same network but works fine. My resolution was to tether my cell to PC version and walk out of ruins. I was then able to go back to home router and Xbox version working fine. Will post a fix after speaking to SE tomorrow if I get someone that knows what they are doing (crosses fingers), but that is not likely. You may be able to have a friend off Comcast or login at wi-fi hotspot off Comcast to get out of area you are in till this is resolved.

PS From searches online this has happened before in 08 so hopefully they know how to resolve it by now.