For this Weather-DIsplay.com outage, I've replied to another thread with Chris(Administrator) responses.
http://www.wxforum.net/index.php?topic=25915.msg250146#newIt looks like it may be an extended outage due to hardware failure, but he has a good backup from 24 April to rebuild.
WXSIM users should probably switch to using the Bohler GFS source in WXSIMATE until Chris is back in service.