I filed an Evernote Support ticket and I contacted Comcast support.
Comcast support told me "the site is blocked form our end".
When I attempt to access via comcast I get this error msg:
Server not found
Firefox can't find the server at discussion.evernote.com.
The Comcast CSR did not know why it was blocked.
Have there been any DNS changes for discussion.evernote.com?
Any ideas on how to get this unblocked by Comcast?